[PATCH 09/13] Move pep8 to third_party/.
Jelmer Vernooij
jelmer at samba.org
Sat Nov 15 12:17:04 MST 2014
Change-Id: Iad543c23794c3689e7dd35f993829cd03c73b862
Signed-off-by: Jelmer Vernooij <jelmer at samba.org>
---
lib/pep8/pep8.py | 1959 ----------------------------------------------
lib/update-external.sh | 3 +-
third_party/pep8/pep8.py | 1959 ++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 1960 insertions(+), 1961 deletions(-)
delete mode 100755 lib/pep8/pep8.py
create mode 100755 third_party/pep8/pep8.py
diff --git a/lib/pep8/pep8.py b/lib/pep8/pep8.py
deleted file mode 100755
index b31a978..0000000
--- a/lib/pep8/pep8.py
+++ /dev/null
@@ -1,1959 +0,0 @@
-#!/usr/bin/env python
-# pep8.py - Check Python source code formatting, according to PEP 8
-# Copyright (C) 2006-2009 Johann C. Rocholl <johann at rocholl.net>
-# Copyright (C) 2009-2014 Florent Xicluna <florent.xicluna at gmail.com>
-#
-# Permission is hereby granted, free of charge, to any person
-# obtaining a copy of this software and associated documentation files
-# (the "Software"), to deal in the Software without restriction,
-# including without limitation the rights to use, copy, modify, merge,
-# publish, distribute, sublicense, and/or sell copies of the Software,
-# and to permit persons to whom the Software is furnished to do so,
-# subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be
-# included in all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
-# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
-# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-# SOFTWARE.
-
-r"""
-Check Python source code formatting, according to PEP 8.
-
-For usage and a list of options, try this:
-$ python pep8.py -h
-
-This program and its regression test suite live here:
-http://github.com/jcrocholl/pep8
-
-Groups of errors and warnings:
-E errors
-W warnings
-100 indentation
-200 whitespace
-300 blank lines
-400 imports
-500 line length
-600 deprecation
-700 statements
-900 syntax error
-"""
-from __future__ import with_statement
-
-__version__ = '1.6.0a0'
-
-import os
-import sys
-import re
-import time
-import inspect
-import keyword
-import tokenize
-from optparse import OptionParser
-from fnmatch import fnmatch
-try:
- from configparser import RawConfigParser
- from io import TextIOWrapper
-except ImportError:
- from ConfigParser import RawConfigParser
-
-DEFAULT_EXCLUDE = '.svn,CVS,.bzr,.hg,.git,__pycache__'
-DEFAULT_IGNORE = 'E123,E226,E24,E704'
-if sys.platform == 'win32':
- DEFAULT_CONFIG = os.path.expanduser(r'~\.pep8')
-else:
- DEFAULT_CONFIG = os.path.join(os.getenv('XDG_CONFIG_HOME') or
- os.path.expanduser('~/.config'), 'pep8')
-PROJECT_CONFIG = ('setup.cfg', 'tox.ini', '.pep8')
-TESTSUITE_PATH = os.path.join(os.path.dirname(__file__), 'testsuite')
-MAX_LINE_LENGTH = 79
-REPORT_FORMAT = {
- 'default': '%(path)s:%(row)d:%(col)d: %(code)s %(text)s',
- 'pylint': '%(path)s:%(row)d: [%(code)s] %(text)s',
-}
-
-PyCF_ONLY_AST = 1024
-SINGLETONS = frozenset(['False', 'None', 'True'])
-KEYWORDS = frozenset(keyword.kwlist + ['print']) - SINGLETONS
-UNARY_OPERATORS = frozenset(['>>', '**', '*', '+', '-'])
-ARITHMETIC_OP = frozenset(['**', '*', '/', '//', '+', '-'])
-WS_OPTIONAL_OPERATORS = ARITHMETIC_OP.union(['^', '&', '|', '<<', '>>', '%'])
-WS_NEEDED_OPERATORS = frozenset([
- '**=', '*=', '/=', '//=', '+=', '-=', '!=', '<>', '<', '>',
- '%=', '^=', '&=', '|=', '==', '<=', '>=', '<<=', '>>=', '='])
-WHITESPACE = frozenset(' \t')
-NEWLINE = frozenset([tokenize.NL, tokenize.NEWLINE])
-SKIP_TOKENS = NEWLINE.union([tokenize.INDENT, tokenize.DEDENT])
-# ERRORTOKEN is triggered by backticks in Python 3
-SKIP_COMMENTS = SKIP_TOKENS.union([tokenize.COMMENT, tokenize.ERRORTOKEN])
-BENCHMARK_KEYS = ['directories', 'files', 'logical lines', 'physical lines']
-
-INDENT_REGEX = re.compile(r'([ \t]*)')
-RAISE_COMMA_REGEX = re.compile(r'raise\s+\w+\s*,')
-RERAISE_COMMA_REGEX = re.compile(r'raise\s+\w+\s*,.*,\s*\w+\s*$')
-ERRORCODE_REGEX = re.compile(r'\b[A-Z]\d{3}\b')
-DOCSTRING_REGEX = re.compile(r'u?r?["\']')
-EXTRANEOUS_WHITESPACE_REGEX = re.compile(r'[[({] | []}),;:]')
-WHITESPACE_AFTER_COMMA_REGEX = re.compile(r'[,;:]\s*(?: |\t)')
-COMPARE_SINGLETON_REGEX = re.compile(r'([=!]=)\s*(None|False|True)')
-COMPARE_NEGATIVE_REGEX = re.compile(r'\b(not)\s+[^[({ ]+\s+(in|is)\s')
-COMPARE_TYPE_REGEX = re.compile(r'(?:[=!]=|is(?:\s+not)?)\s*type(?:s.\w+Type'
- r'|\s*\(\s*([^)]*[^ )])\s*\))')
-KEYWORD_REGEX = re.compile(r'(\s*)\b(?:%s)\b(\s*)' % r'|'.join(KEYWORDS))
-OPERATOR_REGEX = re.compile(r'(?:[^,\s])(\s*)(?:[-+*/|!<=>%&^]+)(\s*)')
-LAMBDA_REGEX = re.compile(r'\blambda\b')
-HUNK_REGEX = re.compile(r'^@@ -\d+(?:,\d+)? \+(\d+)(?:,(\d+))? @@.*$')
-
-# Work around Python < 2.6 behaviour, which does not generate NL after
-# a comment which is on a line by itself.
-COMMENT_WITH_NL = tokenize.generate_tokens(['#\n'].pop).send(None)[1] == '#\n'
-
-
-##############################################################################
-# Plugins (check functions) for physical lines
-##############################################################################
-
-
-def tabs_or_spaces(physical_line, indent_char):
- r"""Never mix tabs and spaces.
-
- The most popular way of indenting Python is with spaces only. The
- second-most popular way is with tabs only. Code indented with a mixture
- of tabs and spaces should be converted to using spaces exclusively. When
- invoking the Python command line interpreter with the -t option, it issues
- warnings about code that illegally mixes tabs and spaces. When using -tt
- these warnings become errors. These options are highly recommended!
-
- Okay: if a == 0:\n a = 1\n b = 1
- E101: if a == 0:\n a = 1\n\tb = 1
- """
- indent = INDENT_REGEX.match(physical_line).group(1)
- for offset, char in enumerate(indent):
- if char != indent_char:
- return offset, "E101 indentation contains mixed spaces and tabs"
-
-
-def tabs_obsolete(physical_line):
- r"""For new projects, spaces-only are strongly recommended over tabs.
-
- Okay: if True:\n return
- W191: if True:\n\treturn
- """
- indent = INDENT_REGEX.match(physical_line).group(1)
- if '\t' in indent:
- return indent.index('\t'), "W191 indentation contains tabs"
-
-
-def trailing_whitespace(physical_line):
- r"""Trailing whitespace is superfluous.
-
- The warning returned varies on whether the line itself is blank, for easier
- filtering for those who want to indent their blank lines.
-
- Okay: spam(1)\n#
- W291: spam(1) \n#
- W293: class Foo(object):\n \n bang = 12
- """
- physical_line = physical_line.rstrip('\n') # chr(10), newline
- physical_line = physical_line.rstrip('\r') # chr(13), carriage return
- physical_line = physical_line.rstrip('\x0c') # chr(12), form feed, ^L
- stripped = physical_line.rstrip(' \t\v')
- if physical_line != stripped:
- if stripped:
- return len(stripped), "W291 trailing whitespace"
- else:
- return 0, "W293 blank line contains whitespace"
-
-
-def trailing_blank_lines(physical_line, lines, line_number, total_lines):
- r"""Trailing blank lines are superfluous.
-
- Okay: spam(1)
- W391: spam(1)\n
-
- However the last line should end with a new line (warning W292).
- """
- if line_number == total_lines:
- stripped_last_line = physical_line.rstrip()
- if not stripped_last_line:
- return 0, "W391 blank line at end of file"
- if stripped_last_line == physical_line:
- return len(physical_line), "W292 no newline at end of file"
-
-
-def maximum_line_length(physical_line, max_line_length, multiline):
- r"""Limit all lines to a maximum of 79 characters.
-
- There are still many devices around that are limited to 80 character
- lines; plus, limiting windows to 80 characters makes it possible to have
- several windows side-by-side. The default wrapping on such devices looks
- ugly. Therefore, please limit all lines to a maximum of 79 characters.
- For flowing long blocks of text (docstrings or comments), limiting the
- length to 72 characters is recommended.
-
- Reports error E501.
- """
- line = physical_line.rstrip()
- length = len(line)
- if length > max_line_length and not noqa(line):
- # Special case for long URLs in multi-line docstrings or comments,
- # but still report the error when the 72 first chars are whitespaces.
- chunks = line.split()
- if ((len(chunks) == 1 and multiline) or
- (len(chunks) == 2 and chunks[0] == '#')) and \
- len(line) - len(chunks[-1]) < max_line_length - 7:
- return
- if hasattr(line, 'decode'): # Python 2
- # The line could contain multi-byte characters
- try:
- length = len(line.decode('utf-8'))
- except UnicodeError:
- pass
- if length > max_line_length:
- return (max_line_length, "E501 line too long "
- "(%d > %d characters)" % (length, max_line_length))
-
-
-##############################################################################
-# Plugins (check functions) for logical lines
-##############################################################################
-
-
-def blank_lines(logical_line, blank_lines, indent_level, line_number,
- blank_before, previous_logical, previous_indent_level):
- r"""Separate top-level function and class definitions with two blank lines.
-
- Method definitions inside a class are separated by a single blank line.
-
- Extra blank lines may be used (sparingly) to separate groups of related
- functions. Blank lines may be omitted between a bunch of related
- one-liners (e.g. a set of dummy implementations).
-
- Use blank lines in functions, sparingly, to indicate logical sections.
-
- Okay: def a():\n pass\n\n\ndef b():\n pass
- Okay: def a():\n pass\n\n\n# Foo\n# Bar\n\ndef b():\n pass
-
- E301: class Foo:\n b = 0\n def bar():\n pass
- E302: def a():\n pass\n\ndef b(n):\n pass
- E303: def a():\n pass\n\n\n\ndef b(n):\n pass
- E303: def a():\n\n\n\n pass
- E304: @decorator\n\ndef a():\n pass
- """
- if line_number < 3 and not previous_logical:
- return # Don't expect blank lines before the first line
- if previous_logical.startswith('@'):
- if blank_lines:
- yield 0, "E304 blank lines found after function decorator"
- elif blank_lines > 2 or (indent_level and blank_lines == 2):
- yield 0, "E303 too many blank lines (%d)" % blank_lines
- elif logical_line.startswith(('def ', 'class ', '@')):
- if indent_level:
- if not (blank_before or previous_indent_level < indent_level or
- DOCSTRING_REGEX.match(previous_logical)):
- yield 0, "E301 expected 1 blank line, found 0"
- elif blank_before != 2:
- yield 0, "E302 expected 2 blank lines, found %d" % blank_before
-
-
-def extraneous_whitespace(logical_line):
- r"""Avoid extraneous whitespace.
-
- Avoid extraneous whitespace in these situations:
- - Immediately inside parentheses, brackets or braces.
- - Immediately before a comma, semicolon, or colon.
-
- Okay: spam(ham[1], {eggs: 2})
- E201: spam( ham[1], {eggs: 2})
- E201: spam(ham[ 1], {eggs: 2})
- E201: spam(ham[1], { eggs: 2})
- E202: spam(ham[1], {eggs: 2} )
- E202: spam(ham[1 ], {eggs: 2})
- E202: spam(ham[1], {eggs: 2 })
-
- E203: if x == 4: print x, y; x, y = y , x
- E203: if x == 4: print x, y ; x, y = y, x
- E203: if x == 4 : print x, y; x, y = y, x
- """
- line = logical_line
- for match in EXTRANEOUS_WHITESPACE_REGEX.finditer(line):
- text = match.group()
- char = text.strip()
- found = match.start()
- if text == char + ' ':
- # assert char in '([{'
- yield found + 1, "E201 whitespace after '%s'" % char
- elif line[found - 1] != ',':
- code = ('E202' if char in '}])' else 'E203') # if char in ',;:'
- yield found, "%s whitespace before '%s'" % (code, char)
-
-
-def whitespace_around_keywords(logical_line):
- r"""Avoid extraneous whitespace around keywords.
-
- Okay: True and False
- E271: True and False
- E272: True and False
- E273: True and\tFalse
- E274: True\tand False
- """
- for match in KEYWORD_REGEX.finditer(logical_line):
- before, after = match.groups()
-
- if '\t' in before:
- yield match.start(1), "E274 tab before keyword"
- elif len(before) > 1:
- yield match.start(1), "E272 multiple spaces before keyword"
-
- if '\t' in after:
- yield match.start(2), "E273 tab after keyword"
- elif len(after) > 1:
- yield match.start(2), "E271 multiple spaces after keyword"
-
-
-def missing_whitespace(logical_line):
- r"""Each comma, semicolon or colon should be followed by whitespace.
-
- Okay: [a, b]
- Okay: (3,)
- Okay: a[1:4]
- Okay: a[:4]
- Okay: a[1:]
- Okay: a[1:4:2]
- E231: ['a','b']
- E231: foo(bar,baz)
- E231: [{'a':'b'}]
- """
- line = logical_line
- for index in range(len(line) - 1):
- char = line[index]
- if char in ',;:' and line[index + 1] not in WHITESPACE:
- before = line[:index]
- if char == ':' and before.count('[') > before.count(']') and \
- before.rfind('{') < before.rfind('['):
- continue # Slice syntax, no space required
- if char == ',' and line[index + 1] == ')':
- continue # Allow tuple with only one element: (3,)
- yield index, "E231 missing whitespace after '%s'" % char
-
-
-def indentation(logical_line, previous_logical, indent_char,
- indent_level, previous_indent_level):
- r"""Use 4 spaces per indentation level.
-
- For really old code that you don't want to mess up, you can continue to
- use 8-space tabs.
-
- Okay: a = 1
- Okay: if a == 0:\n a = 1
- E111: a = 1
- E114: # a = 1
-
- Okay: for item in items:\n pass
- E112: for item in items:\npass
- E115: for item in items:\n# Hi\n pass
-
- Okay: a = 1\nb = 2
- E113: a = 1\n b = 2
- E116: a = 1\n # b = 2
- """
- c = 0 if logical_line else 3
- tmpl = "E11%d %s" if logical_line else "E11%d %s (comment)"
- if indent_level % 4:
- yield 0, tmpl % (1 + c, "indentation is not a multiple of four")
- indent_expect = previous_logical.endswith(':')
- if indent_expect and indent_level <= previous_indent_level:
- yield 0, tmpl % (2 + c, "expected an indented block")
- elif not indent_expect and indent_level > previous_indent_level:
- yield 0, tmpl % (3 + c, "unexpected indentation")
-
-
-def continued_indentation(logical_line, tokens, indent_level, hang_closing,
- indent_char, noqa, verbose):
- r"""Continuation lines indentation.
-
- Continuation lines should align wrapped elements either vertically
- using Python's implicit line joining inside parentheses, brackets
- and braces, or using a hanging indent.
-
- When using a hanging indent these considerations should be applied:
- - there should be no arguments on the first line, and
- - further indentation should be used to clearly distinguish itself as a
- continuation line.
-
- Okay: a = (\n)
- E123: a = (\n )
-
- Okay: a = (\n 42)
- E121: a = (\n 42)
- E122: a = (\n42)
- E123: a = (\n 42\n )
- E124: a = (24,\n 42\n)
- E125: if (\n b):\n pass
- E126: a = (\n 42)
- E127: a = (24,\n 42)
- E128: a = (24,\n 42)
- E129: if (a or\n b):\n pass
- E131: a = (\n 42\n 24)
- """
- first_row = tokens[0][2][0]
- nrows = 1 + tokens[-1][2][0] - first_row
- if noqa or nrows == 1:
- return
-
- # indent_next tells us whether the next block is indented; assuming
- # that it is indented by 4 spaces, then we should not allow 4-space
- # indents on the final continuation line; in turn, some other
- # indents are allowed to have an extra 4 spaces.
- indent_next = logical_line.endswith(':')
-
- row = depth = 0
- valid_hangs = (4,) if indent_char != '\t' else (4, 8)
- # remember how many brackets were opened on each line
- parens = [0] * nrows
- # relative indents of physical lines
- rel_indent = [0] * nrows
- # for each depth, collect a list of opening rows
- open_rows = [[0]]
- # for each depth, memorize the hanging indentation
- hangs = [None]
- # visual indents
- indent_chances = {}
- last_indent = tokens[0][2]
- visual_indent = None
- # for each depth, memorize the visual indent column
- indent = [last_indent[1]]
- if verbose >= 3:
- print(">>> " + tokens[0][4].rstrip())
-
- for token_type, text, start, end, line in tokens:
-
- newline = row < start[0] - first_row
- if newline:
- row = start[0] - first_row
- newline = not last_token_multiline and token_type not in NEWLINE
-
- if newline:
- # this is the beginning of a continuation line.
- last_indent = start
- if verbose >= 3:
- print("... " + line.rstrip())
-
- # record the initial indent.
- rel_indent[row] = expand_indent(line) - indent_level
-
- # identify closing bracket
- close_bracket = (token_type == tokenize.OP and text in ']})')
-
- # is the indent relative to an opening bracket line?
- for open_row in reversed(open_rows[depth]):
- hang = rel_indent[row] - rel_indent[open_row]
- hanging_indent = hang in valid_hangs
- if hanging_indent:
- break
- if hangs[depth]:
- hanging_indent = (hang == hangs[depth])
- # is there any chance of visual indent?
- visual_indent = (not close_bracket and hang > 0 and
- indent_chances.get(start[1]))
-
- if close_bracket and indent[depth]:
- # closing bracket for visual indent
- if start[1] != indent[depth]:
- yield (start, "E124 closing bracket does not match "
- "visual indentation")
- elif close_bracket and not hang:
- # closing bracket matches indentation of opening bracket's line
- if hang_closing:
- yield start, "E133 closing bracket is missing indentation"
- elif indent[depth] and start[1] < indent[depth]:
- if visual_indent is not True:
- # visual indent is broken
- yield (start, "E128 continuation line "
- "under-indented for visual indent")
- elif hanging_indent or (indent_next and rel_indent[row] == 8):
- # hanging indent is verified
- if close_bracket and not hang_closing:
- yield (start, "E123 closing bracket does not match "
- "indentation of opening bracket's line")
- hangs[depth] = hang
- elif visual_indent is True:
- # visual indent is verified
- indent[depth] = start[1]
- elif visual_indent in (text, str):
- # ignore token lined up with matching one from a previous line
- pass
- else:
- # indent is broken
- if hang <= 0:
- error = "E122", "missing indentation or outdented"
- elif indent[depth]:
- error = "E127", "over-indented for visual indent"
- elif not close_bracket and hangs[depth]:
- error = "E131", "unaligned for hanging indent"
- else:
- hangs[depth] = hang
- if hang > 4:
- error = "E126", "over-indented for hanging indent"
- else:
- error = "E121", "under-indented for hanging indent"
- yield start, "%s continuation line %s" % error
-
- # look for visual indenting
- if (parens[row] and token_type not in (tokenize.NL, tokenize.COMMENT)
- and not indent[depth]):
- indent[depth] = start[1]
- indent_chances[start[1]] = True
- if verbose >= 4:
- print("bracket depth %s indent to %s" % (depth, start[1]))
- # deal with implicit string concatenation
- elif (token_type in (tokenize.STRING, tokenize.COMMENT) or
- text in ('u', 'ur', 'b', 'br')):
- indent_chances[start[1]] = str
- # special case for the "if" statement because len("if (") == 4
- elif not indent_chances and not row and not depth and text == 'if':
- indent_chances[end[1] + 1] = True
- elif text == ':' and line[end[1]:].isspace():
- open_rows[depth].append(row)
-
- # keep track of bracket depth
- if token_type == tokenize.OP:
- if text in '([{':
- depth += 1
- indent.append(0)
- hangs.append(None)
- if len(open_rows) == depth:
- open_rows.append([])
- open_rows[depth].append(row)
- parens[row] += 1
- if verbose >= 4:
- print("bracket depth %s seen, col %s, visual min = %s" %
- (depth, start[1], indent[depth]))
- elif text in ')]}' and depth > 0:
- # parent indents should not be more than this one
- prev_indent = indent.pop() or last_indent[1]
- hangs.pop()
- for d in range(depth):
- if indent[d] > prev_indent:
- indent[d] = 0
- for ind in list(indent_chances):
- if ind >= prev_indent:
- del indent_chances[ind]
- del open_rows[depth + 1:]
- depth -= 1
- if depth:
- indent_chances[indent[depth]] = True
- for idx in range(row, -1, -1):
- if parens[idx]:
- parens[idx] -= 1
- break
- assert len(indent) == depth + 1
- if start[1] not in indent_chances:
- # allow to line up tokens
- indent_chances[start[1]] = text
-
- last_token_multiline = (start[0] != end[0])
- if last_token_multiline:
- rel_indent[end[0] - first_row] = rel_indent[row]
-
- if indent_next and expand_indent(line) == indent_level + 4:
- pos = (start[0], indent[0] + 4)
- if visual_indent:
- code = "E129 visually indented line"
- else:
- code = "E125 continuation line"
- yield pos, "%s with same indent as next logical line" % code
-
-
-def whitespace_before_parameters(logical_line, tokens):
- r"""Avoid extraneous whitespace.
-
- Avoid extraneous whitespace in the following situations:
- - before the open parenthesis that starts the argument list of a
- function call.
- - before the open parenthesis that starts an indexing or slicing.
-
- Okay: spam(1)
- E211: spam (1)
-
- Okay: dict['key'] = list[index]
- E211: dict ['key'] = list[index]
- E211: dict['key'] = list [index]
- """
- prev_type, prev_text, __, prev_end, __ = tokens[0]
- for index in range(1, len(tokens)):
- token_type, text, start, end, __ = tokens[index]
- if (token_type == tokenize.OP and
- text in '([' and
- start != prev_end and
- (prev_type == tokenize.NAME or prev_text in '}])') and
- # Syntax "class A (B):" is allowed, but avoid it
- (index < 2 or tokens[index - 2][1] != 'class') and
- # Allow "return (a.foo for a in range(5))"
- not keyword.iskeyword(prev_text)):
- yield prev_end, "E211 whitespace before '%s'" % text
- prev_type = token_type
- prev_text = text
- prev_end = end
-
-
-def whitespace_around_operator(logical_line):
- r"""Avoid extraneous whitespace around an operator.
-
- Okay: a = 12 + 3
- E221: a = 4 + 5
- E222: a = 4 + 5
- E223: a = 4\t+ 5
- E224: a = 4 +\t5
- """
- for match in OPERATOR_REGEX.finditer(logical_line):
- before, after = match.groups()
-
- if '\t' in before:
- yield match.start(1), "E223 tab before operator"
- elif len(before) > 1:
- yield match.start(1), "E221 multiple spaces before operator"
-
- if '\t' in after:
- yield match.start(2), "E224 tab after operator"
- elif len(after) > 1:
- yield match.start(2), "E222 multiple spaces after operator"
-
-
-def missing_whitespace_around_operator(logical_line, tokens):
- r"""Surround operators with a single space on either side.
-
- - Always surround these binary operators with a single space on
- either side: assignment (=), augmented assignment (+=, -= etc.),
- comparisons (==, <, >, !=, <=, >=, in, not in, is, is not),
- Booleans (and, or, not).
-
- - If operators with different priorities are used, consider adding
- whitespace around the operators with the lowest priorities.
-
- Okay: i = i + 1
- Okay: submitted += 1
- Okay: x = x * 2 - 1
- Okay: hypot2 = x * x + y * y
- Okay: c = (a + b) * (a - b)
- Okay: foo(bar, key='word', *args, **kwargs)
- Okay: alpha[:-i]
-
- E225: i=i+1
- E225: submitted +=1
- E225: x = x /2 - 1
- E225: z = x **y
- E226: c = (a+b) * (a-b)
- E226: hypot2 = x*x + y*y
- E227: c = a|b
- E228: msg = fmt%(errno, errmsg)
- """
- parens = 0
- need_space = False
- prev_type = tokenize.OP
- prev_text = prev_end = None
- for token_type, text, start, end, line in tokens:
- if token_type in SKIP_COMMENTS:
- continue
- if text in ('(', 'lambda'):
- parens += 1
- elif text == ')':
- parens -= 1
- if need_space:
- if start != prev_end:
- # Found a (probably) needed space
- if need_space is not True and not need_space[1]:
- yield (need_space[0],
- "E225 missing whitespace around operator")
- need_space = False
- elif text == '>' and prev_text in ('<', '-'):
- # Tolerate the "<>" operator, even if running Python 3
- # Deal with Python 3's annotated return value "->"
- pass
- else:
- if need_space is True or need_space[1]:
- # A needed trailing space was not found
- yield prev_end, "E225 missing whitespace around operator"
- else:
- code, optype = 'E226', 'arithmetic'
- if prev_text == '%':
- code, optype = 'E228', 'modulo'
- elif prev_text not in ARITHMETIC_OP:
- code, optype = 'E227', 'bitwise or shift'
- yield (need_space[0], "%s missing whitespace "
- "around %s operator" % (code, optype))
- need_space = False
- elif token_type == tokenize.OP and prev_end is not None:
- if text == '=' and parens:
- # Allow keyword args or defaults: foo(bar=None).
- pass
- elif text in WS_NEEDED_OPERATORS:
- need_space = True
- elif text in UNARY_OPERATORS:
- # Check if the operator is being used as a binary operator
- # Allow unary operators: -123, -x, +1.
- # Allow argument unpacking: foo(*args, **kwargs).
- if (prev_text in '}])' if prev_type == tokenize.OP
- else prev_text not in KEYWORDS):
- need_space = None
- elif text in WS_OPTIONAL_OPERATORS:
- need_space = None
-
- if need_space is None:
- # Surrounding space is optional, but ensure that
- # trailing space matches opening space
- need_space = (prev_end, start != prev_end)
- elif need_space and start == prev_end:
- # A needed opening space was not found
- yield prev_end, "E225 missing whitespace around operator"
- need_space = False
- prev_type = token_type
- prev_text = text
- prev_end = end
-
-
-def whitespace_around_comma(logical_line):
- r"""Avoid extraneous whitespace after a comma or a colon.
-
- Note: these checks are disabled by default
-
- Okay: a = (1, 2)
- E241: a = (1, 2)
- E242: a = (1,\t2)
- """
- line = logical_line
- for m in WHITESPACE_AFTER_COMMA_REGEX.finditer(line):
- found = m.start() + 1
- if '\t' in m.group():
- yield found, "E242 tab after '%s'" % m.group()[0]
- else:
- yield found, "E241 multiple spaces after '%s'" % m.group()[0]
-
-
-def whitespace_around_named_parameter_equals(logical_line, tokens):
- r"""Don't use spaces around the '=' sign in function arguments.
-
- Don't use spaces around the '=' sign when used to indicate a
- keyword argument or a default parameter value.
-
- Okay: def complex(real, imag=0.0):
- Okay: return magic(r=real, i=imag)
- Okay: boolean(a == b)
- Okay: boolean(a != b)
- Okay: boolean(a <= b)
- Okay: boolean(a >= b)
-
- E251: def complex(real, imag = 0.0):
- E251: return magic(r = real, i = imag)
- """
- parens = 0
- no_space = False
- prev_end = None
- message = "E251 unexpected spaces around keyword / parameter equals"
- for token_type, text, start, end, line in tokens:
- if token_type == tokenize.NL:
- continue
- if no_space:
- no_space = False
- if start != prev_end:
- yield (prev_end, message)
- elif token_type == tokenize.OP:
- if text == '(':
- parens += 1
- elif text == ')':
- parens -= 1
- elif parens and text == '=':
- no_space = True
- if start != prev_end:
- yield (prev_end, message)
- prev_end = end
-
-
-def whitespace_before_comment(logical_line, tokens):
- r"""Separate inline comments by at least two spaces.
-
- An inline comment is a comment on the same line as a statement. Inline
- comments should be separated by at least two spaces from the statement.
- They should start with a # and a single space.
-
- Each line of a block comment starts with a # and a single space
- (unless it is indented text inside the comment).
-
- Okay: x = x + 1 # Increment x
- Okay: x = x + 1 # Increment x
- Okay: # Block comment
- E261: x = x + 1 # Increment x
- E262: x = x + 1 #Increment x
- E262: x = x + 1 # Increment x
- E265: #Block comment
- E266: ### Block comment
- """
- prev_end = (0, 0)
- for token_type, text, start, end, line in tokens:
- if token_type == tokenize.COMMENT:
- inline_comment = line[:start[1]].strip()
- if inline_comment:
- if prev_end[0] == start[0] and start[1] < prev_end[1] + 2:
- yield (prev_end,
- "E261 at least two spaces before inline comment")
- symbol, sp, comment = text.partition(' ')
- bad_prefix = symbol not in '#:' and (symbol.lstrip('#')[:1] or '#')
- if inline_comment:
- if bad_prefix or comment[:1] in WHITESPACE:
- yield start, "E262 inline comment should start with '# '"
- elif bad_prefix and (bad_prefix != '!' or start[0] > 1):
- if bad_prefix != '#':
- yield start, "E265 block comment should start with '# '"
- elif comment:
- yield start, "E266 too many leading '#' for block comment"
- elif token_type != tokenize.NL:
- prev_end = end
-
-
-def imports_on_separate_lines(logical_line):
- r"""Imports should usually be on separate lines.
-
- Okay: import os\nimport sys
- E401: import sys, os
-
- Okay: from subprocess import Popen, PIPE
- Okay: from myclas import MyClass
- Okay: from foo.bar.yourclass import YourClass
- Okay: import myclass
- Okay: import foo.bar.yourclass
- """
- line = logical_line
- if line.startswith('import '):
- found = line.find(',')
- if -1 < found and ';' not in line[:found]:
- yield found, "E401 multiple imports on one line"
-
-
-def compound_statements(logical_line):
- r"""Compound statements (on the same line) are generally discouraged.
-
- While sometimes it's okay to put an if/for/while with a small body
- on the same line, never do this for multi-clause statements.
- Also avoid folding such long lines!
-
- Always use a def statement instead of an assignment statement that
- binds a lambda expression directly to a name.
-
- Okay: if foo == 'blah':\n do_blah_thing()
- Okay: do_one()
- Okay: do_two()
- Okay: do_three()
-
- E701: if foo == 'blah': do_blah_thing()
- E701: for x in lst: total += x
- E701: while t < 10: t = delay()
- E701: if foo == 'blah': do_blah_thing()
- E701: else: do_non_blah_thing()
- E701: try: something()
- E701: finally: cleanup()
- E701: if foo == 'blah': one(); two(); three()
- E702: do_one(); do_two(); do_three()
- E703: do_four(); # useless semicolon
- E704: def f(x): return 2*x
- E731: f = lambda x: 2*x
- """
- line = logical_line
- last_char = len(line) - 1
- found = line.find(':')
- while -1 < found < last_char:
- before = line[:found]
- if ((before.count('{') <= before.count('}') and # {'a': 1} (dict)
- before.count('[') <= before.count(']') and # [1:2] (slice)
- before.count('(') <= before.count(')'))): # (annotation)
- if LAMBDA_REGEX.search(before):
- yield 0, "E731 do not assign a lambda expression, use a def"
- break
- if before.startswith('def '):
- yield 0, "E704 multiple statements on one line (def)"
- else:
- yield found, "E701 multiple statements on one line (colon)"
- found = line.find(':', found + 1)
- found = line.find(';')
- while -1 < found:
- if found < last_char:
- yield found, "E702 multiple statements on one line (semicolon)"
- else:
- yield found, "E703 statement ends with a semicolon"
- found = line.find(';', found + 1)
-
-
-def explicit_line_join(logical_line, tokens):
- r"""Avoid explicit line join between brackets.
-
- The preferred way of wrapping long lines is by using Python's implied line
- continuation inside parentheses, brackets and braces. Long lines can be
- broken over multiple lines by wrapping expressions in parentheses. These
- should be used in preference to using a backslash for line continuation.
-
- E502: aaa = [123, \\n 123]
- E502: aaa = ("bbb " \\n "ccc")
-
- Okay: aaa = [123,\n 123]
- Okay: aaa = ("bbb "\n "ccc")
- Okay: aaa = "bbb " \\n "ccc"
- """
- prev_start = prev_end = parens = 0
- for token_type, text, start, end, line in tokens:
- if start[0] != prev_start and parens and backslash:
- yield backslash, "E502 the backslash is redundant between brackets"
- if end[0] != prev_end:
- if line.rstrip('\r\n').endswith('\\'):
- backslash = (end[0], len(line.splitlines()[-1]) - 1)
- else:
- backslash = None
- prev_start = prev_end = end[0]
- else:
- prev_start = start[0]
- if token_type == tokenize.OP:
- if text in '([{':
- parens += 1
- elif text in ')]}':
- parens -= 1
-
-
-def comparison_to_singleton(logical_line, noqa):
- r"""Comparison to singletons should use "is" or "is not".
-
- Comparisons to singletons like None should always be done
- with "is" or "is not", never the equality operators.
-
- Okay: if arg is not None:
- E711: if arg != None:
- E712: if arg == True:
-
- Also, beware of writing if x when you really mean if x is not None --
- e.g. when testing whether a variable or argument that defaults to None was
- set to some other value. The other value might have a type (such as a
- container) that could be false in a boolean context!
- """
- match = not noqa and COMPARE_SINGLETON_REGEX.search(logical_line)
- if match:
- same = (match.group(1) == '==')
- singleton = match.group(2)
- msg = "'if cond is %s:'" % (('' if same else 'not ') + singleton)
- if singleton in ('None',):
- code = 'E711'
- else:
- code = 'E712'
- nonzero = ((singleton == 'True' and same) or
- (singleton == 'False' and not same))
- msg += " or 'if %scond:'" % ('' if nonzero else 'not ')
- yield match.start(1), ("%s comparison to %s should be %s" %
- (code, singleton, msg))
-
-
-def comparison_negative(logical_line):
- r"""Negative comparison should be done using "not in" and "is not".
-
- Okay: if x not in y:\n pass
- Okay: assert (X in Y or X is Z)
- Okay: if not (X in Y):\n pass
- Okay: zz = x is not y
- E713: Z = not X in Y
- E713: if not X.B in Y:\n pass
- E714: if not X is Y:\n pass
- E714: Z = not X.B is Y
- """
- match = COMPARE_NEGATIVE_REGEX.search(logical_line)
- if match:
- pos = match.start(1)
- if match.group(2) == 'in':
- yield pos, "E713 test for membership should be 'not in'"
- else:
- yield pos, "E714 test for object identity should be 'is not'"
-
-
-def comparison_type(logical_line):
- r"""Object type comparisons should always use isinstance().
-
- Do not compare types directly.
-
- Okay: if isinstance(obj, int):
- E721: if type(obj) is type(1):
-
- When checking if an object is a string, keep in mind that it might be a
- unicode string too! In Python 2.3, str and unicode have a common base
- class, basestring, so you can do:
-
- Okay: if isinstance(obj, basestring):
- Okay: if type(a1) is type(b1):
- """
- match = COMPARE_TYPE_REGEX.search(logical_line)
- if match:
- inst = match.group(1)
- if inst and isidentifier(inst) and inst not in SINGLETONS:
- return # Allow comparison for types which are not obvious
- yield match.start(), "E721 do not compare types, use 'isinstance()'"
-
-
-def python_3000_has_key(logical_line, noqa):
- r"""The {}.has_key() method is removed in Python 3: use the 'in' operator.
-
- Okay: if "alph" in d:\n print d["alph"]
- W601: assert d.has_key('alph')
- """
- pos = logical_line.find('.has_key(')
- if pos > -1 and not noqa:
- yield pos, "W601 .has_key() is deprecated, use 'in'"
-
-
-def python_3000_raise_comma(logical_line):
- r"""When raising an exception, use "raise ValueError('message')".
-
- The older form is removed in Python 3.
-
- Okay: raise DummyError("Message")
- W602: raise DummyError, "Message"
- """
- match = RAISE_COMMA_REGEX.match(logical_line)
- if match and not RERAISE_COMMA_REGEX.match(logical_line):
- yield match.end() - 1, "W602 deprecated form of raising exception"
-
-
-def python_3000_not_equal(logical_line):
- r"""New code should always use != instead of <>.
-
- The older syntax is removed in Python 3.
-
- Okay: if a != 'no':
- W603: if a <> 'no':
- """
- pos = logical_line.find('<>')
- if pos > -1:
- yield pos, "W603 '<>' is deprecated, use '!='"
-
-
-def python_3000_backticks(logical_line):
- r"""Backticks are removed in Python 3: use repr() instead.
-
- Okay: val = repr(1 + 2)
- W604: val = `1 + 2`
- """
- pos = logical_line.find('`')
- if pos > -1:
- yield pos, "W604 backticks are deprecated, use 'repr()'"
-
-
-##############################################################################
-# Helper functions
-##############################################################################
-
-
-if '' == ''.encode():
- # Python 2: implicit encoding.
- def readlines(filename):
- """Read the source code."""
- with open(filename, 'rU') as f:
- return f.readlines()
- isidentifier = re.compile(r'[a-zA-Z_]\w*').match
- stdin_get_value = sys.stdin.read
-else:
- # Python 3
- def readlines(filename):
- """Read the source code."""
- try:
- with open(filename, 'rb') as f:
- (coding, lines) = tokenize.detect_encoding(f.readline)
- f = TextIOWrapper(f, coding, line_buffering=True)
- return [l.decode(coding) for l in lines] + f.readlines()
- except (LookupError, SyntaxError, UnicodeError):
- # Fall back if file encoding is improperly declared
- with open(filename, encoding='latin-1') as f:
- return f.readlines()
- isidentifier = str.isidentifier
-
- def stdin_get_value():
- return TextIOWrapper(sys.stdin.buffer, errors='ignore').read()
-noqa = re.compile(r'# no(?:qa|pep8)\b', re.I).search
-
-
-def expand_indent(line):
- r"""Return the amount of indentation.
-
- Tabs are expanded to the next multiple of 8.
-
- >>> expand_indent(' ')
- 4
- >>> expand_indent('\t')
- 8
- >>> expand_indent(' \t')
- 8
- >>> expand_indent(' \t')
- 16
- """
- if '\t' not in line:
- return len(line) - len(line.lstrip())
- result = 0
- for char in line:
- if char == '\t':
- result = result // 8 * 8 + 8
- elif char == ' ':
- result += 1
- else:
- break
- return result
-
-
-def mute_string(text):
- """Replace contents with 'xxx' to prevent syntax matching.
-
- >>> mute_string('"abc"')
- '"xxx"'
- >>> mute_string("'''abc'''")
- "'''xxx'''"
- >>> mute_string("r'abc'")
- "r'xxx'"
- """
- # String modifiers (e.g. u or r)
- start = text.index(text[-1]) + 1
- end = len(text) - 1
- # Triple quotes
- if text[-3:] in ('"""', "'''"):
- start += 2
- end -= 2
- return text[:start] + 'x' * (end - start) + text[end:]
-
-
-def parse_udiff(diff, patterns=None, parent='.'):
- """Return a dictionary of matching lines."""
- # For each file of the diff, the entry key is the filename,
- # and the value is a set of row numbers to consider.
- rv = {}
- path = nrows = None
- for line in diff.splitlines():
- if nrows:
- if line[:1] != '-':
- nrows -= 1
- continue
- if line[:3] == '@@ ':
- hunk_match = HUNK_REGEX.match(line)
- (row, nrows) = [int(g or '1') for g in hunk_match.groups()]
- rv[path].update(range(row, row + nrows))
- elif line[:3] == '+++':
- path = line[4:].split('\t', 1)[0]
- if path[:2] == 'b/':
- path = path[2:]
- rv[path] = set()
- return dict([(os.path.join(parent, path), rows)
- for (path, rows) in rv.items()
- if rows and filename_match(path, patterns)])
-
-
-def normalize_paths(value, parent=os.curdir):
- """Parse a comma-separated list of paths.
-
- Return a list of absolute paths.
- """
- if not value or isinstance(value, list):
- return value
- paths = []
- for path in value.split(','):
- if '/' in path:
- path = os.path.abspath(os.path.join(parent, path))
- paths.append(path.rstrip('/'))
- return paths
-
-
-def filename_match(filename, patterns, default=True):
- """Check if patterns contains a pattern that matches filename.
-
- If patterns is unspecified, this always returns True.
- """
- if not patterns:
- return default
- return any(fnmatch(filename, pattern) for pattern in patterns)
-
-
-if COMMENT_WITH_NL:
- def _is_eol_token(token):
- return (token[0] in NEWLINE or
- (token[0] == tokenize.COMMENT and token[1] == token[4]))
-else:
- def _is_eol_token(token):
- return token[0] in NEWLINE
-
-
-##############################################################################
-# Framework to run all checks
-##############################################################################
-
-
-_checks = {'physical_line': {}, 'logical_line': {}, 'tree': {}}
-
-
-def register_check(check, codes=None):
- """Register a new check object."""
- def _add_check(check, kind, codes, args):
- if check in _checks[kind]:
- _checks[kind][check][0].extend(codes or [])
- else:
- _checks[kind][check] = (codes or [''], args)
- if inspect.isfunction(check):
- args = inspect.getargspec(check)[0]
- if args and args[0] in ('physical_line', 'logical_line'):
- if codes is None:
- codes = ERRORCODE_REGEX.findall(check.__doc__ or '')
- _add_check(check, args[0], codes, args)
- elif inspect.isclass(check):
- if inspect.getargspec(check.__init__)[0][:2] == ['self', 'tree']:
- _add_check(check, 'tree', codes, None)
-
-
-def init_checks_registry():
- """Register all globally visible functions.
-
- The first argument name is either 'physical_line' or 'logical_line'.
- """
- mod = inspect.getmodule(register_check)
- for (name, function) in inspect.getmembers(mod, inspect.isfunction):
- register_check(function)
-init_checks_registry()
-
-
-class Checker(object):
- """Load a Python source file, tokenize it, check coding style."""
-
- def __init__(self, filename=None, lines=None,
- options=None, report=None, **kwargs):
- if options is None:
- options = StyleGuide(kwargs).options
- else:
- assert not kwargs
- self._io_error = None
- self._physical_checks = options.physical_checks
- self._logical_checks = options.logical_checks
- self._ast_checks = options.ast_checks
- self.max_line_length = options.max_line_length
- self.multiline = False # in a multiline string?
- self.hang_closing = options.hang_closing
- self.verbose = options.verbose
- self.filename = filename
- if filename is None:
- self.filename = 'stdin'
- self.lines = lines or []
- elif filename == '-':
- self.filename = 'stdin'
- self.lines = stdin_get_value().splitlines(True)
- elif lines is None:
- try:
- self.lines = readlines(filename)
- except IOError:
- (exc_type, exc) = sys.exc_info()[:2]
- self._io_error = '%s: %s' % (exc_type.__name__, exc)
- self.lines = []
- else:
- self.lines = lines
- if self.lines:
- ord0 = ord(self.lines[0][0])
- if ord0 in (0xef, 0xfeff): # Strip the UTF-8 BOM
- if ord0 == 0xfeff:
- self.lines[0] = self.lines[0][1:]
- elif self.lines[0][:3] == '\xef\xbb\xbf':
- self.lines[0] = self.lines[0][3:]
- self.report = report or options.report
- self.report_error = self.report.error
-
- def report_invalid_syntax(self):
- """Check if the syntax is valid."""
- (exc_type, exc) = sys.exc_info()[:2]
- if len(exc.args) > 1:
- offset = exc.args[1]
- if len(offset) > 2:
- offset = offset[1:3]
- else:
- offset = (1, 0)
- self.report_error(offset[0], offset[1] or 0,
- 'E901 %s: %s' % (exc_type.__name__, exc.args[0]),
- self.report_invalid_syntax)
-
- def readline(self):
- """Get the next line from the input buffer."""
- if self.line_number >= self.total_lines:
- return ''
- line = self.lines[self.line_number]
- self.line_number += 1
- if self.indent_char is None and line[:1] in WHITESPACE:
- self.indent_char = line[0]
- return line
-
- def run_check(self, check, argument_names):
- """Run a check plugin."""
- arguments = []
- for name in argument_names:
- arguments.append(getattr(self, name))
- return check(*arguments)
-
- def check_physical(self, line):
- """Run all physical checks on a raw input line."""
- self.physical_line = line
- for name, check, argument_names in self._physical_checks:
- result = self.run_check(check, argument_names)
- if result is not None:
- (offset, text) = result
- self.report_error(self.line_number, offset, text, check)
- if text[:4] == 'E101':
- self.indent_char = line[0]
-
- def build_tokens_line(self):
- """Build a logical line from tokens."""
- logical = []
- comments = []
- length = 0
- prev_row = prev_col = mapping = None
- for token_type, text, start, end, line in self.tokens:
- if token_type in SKIP_TOKENS:
- continue
- if not mapping:
- mapping = [(0, start)]
- if token_type == tokenize.COMMENT:
- comments.append(text)
- continue
- if token_type == tokenize.STRING:
- text = mute_string(text)
- if prev_row:
- (start_row, start_col) = start
- if prev_row != start_row: # different row
- prev_text = self.lines[prev_row - 1][prev_col - 1]
- if prev_text == ',' or (prev_text not in '{[('
- and text not in '}])'):
- text = ' ' + text
- elif prev_col != start_col: # different column
- text = line[prev_col:start_col] + text
- logical.append(text)
- length += len(text)
- mapping.append((length, end))
- (prev_row, prev_col) = end
- self.logical_line = ''.join(logical)
- self.noqa = comments and noqa(''.join(comments))
- return mapping
-
- def check_logical(self):
- """Build a line from tokens and run all logical checks on it."""
- self.report.increment_logical_line()
- mapping = self.build_tokens_line()
- (start_row, start_col) = mapping[0][1]
- start_line = self.lines[start_row - 1]
- self.indent_level = expand_indent(start_line[:start_col])
- if self.blank_before < self.blank_lines:
- self.blank_before = self.blank_lines
- if self.verbose >= 2:
- print(self.logical_line[:80].rstrip())
- for name, check, argument_names in self._logical_checks:
- if self.verbose >= 4:
- print(' ' + name)
- for offset, text in self.run_check(check, argument_names) or ():
- if not isinstance(offset, tuple):
- for token_offset, pos in mapping:
- if offset <= token_offset:
- break
- offset = (pos[0], pos[1] + offset - token_offset)
- self.report_error(offset[0], offset[1], text, check)
- if self.logical_line:
- self.previous_indent_level = self.indent_level
- self.previous_logical = self.logical_line
- self.blank_lines = 0
- self.tokens = []
-
- def check_ast(self):
- """Build the file's AST and run all AST checks."""
- try:
- tree = compile(''.join(self.lines), '', 'exec', PyCF_ONLY_AST)
- except (SyntaxError, TypeError):
- return self.report_invalid_syntax()
- for name, cls, __ in self._ast_checks:
- checker = cls(tree, self.filename)
- for lineno, offset, text, check in checker.run():
- if not self.lines or not noqa(self.lines[lineno - 1]):
- self.report_error(lineno, offset, text, check)
-
- def generate_tokens(self):
- """Tokenize the file, run physical line checks and yield tokens."""
- if self._io_error:
- self.report_error(1, 0, 'E902 %s' % self._io_error, readlines)
- tokengen = tokenize.generate_tokens(self.readline)
- try:
- for token in tokengen:
- if token[2][0] > self.total_lines:
- return
- self.maybe_check_physical(token)
- yield token
- except (SyntaxError, tokenize.TokenError):
- self.report_invalid_syntax()
-
- def maybe_check_physical(self, token):
- """If appropriate (based on token), check current physical line(s)."""
- # Called after every token, but act only on end of line.
- if _is_eol_token(token):
- # Obviously, a newline token ends a single physical line.
- self.check_physical(token[4])
- elif token[0] == tokenize.STRING and '\n' in token[1]:
- # Less obviously, a string that contains newlines is a
- # multiline string, either triple-quoted or with internal
- # newlines backslash-escaped. Check every physical line in the
- # string *except* for the last one: its newline is outside of
- # the multiline string, so we consider it a regular physical
- # line, and will check it like any other physical line.
- #
- # Subtleties:
- # - we don't *completely* ignore the last line; if it contains
- # the magical "# noqa" comment, we disable all physical
- # checks for the entire multiline string
- # - have to wind self.line_number back because initially it
- # points to the last line of the string, and we want
- # check_physical() to give accurate feedback
- if noqa(token[4]):
- return
- self.multiline = True
- self.line_number = token[2][0]
- for line in token[1].split('\n')[:-1]:
- self.check_physical(line + '\n')
- self.line_number += 1
- self.multiline = False
-
- def check_all(self, expected=None, line_offset=0):
- """Run all checks on the input file."""
- self.report.init_file(self.filename, self.lines, expected, line_offset)
- self.total_lines = len(self.lines)
- if self._ast_checks:
- self.check_ast()
- self.line_number = 0
- self.indent_char = None
- self.indent_level = self.previous_indent_level = 0
- self.previous_logical = ''
- self.tokens = []
- self.blank_lines = self.blank_before = 0
- parens = 0
- for token in self.generate_tokens():
- self.tokens.append(token)
- token_type, text = token[0:2]
- if self.verbose >= 3:
- if token[2][0] == token[3][0]:
- pos = '[%s:%s]' % (token[2][1] or '', token[3][1])
- else:
- pos = 'l.%s' % token[3][0]
- print('l.%s\t%s\t%s\t%r' %
- (token[2][0], pos, tokenize.tok_name[token[0]], text))
- if token_type == tokenize.OP:
- if text in '([{':
- parens += 1
- elif text in '}])':
- parens -= 1
- elif not parens:
- if token_type in NEWLINE:
- if token_type == tokenize.NEWLINE:
- self.check_logical()
- self.blank_before = 0
- elif len(self.tokens) == 1:
- # The physical line contains only this token.
- self.blank_lines += 1
- del self.tokens[0]
- else:
- self.check_logical()
- elif COMMENT_WITH_NL and token_type == tokenize.COMMENT:
- if len(self.tokens) == 1:
- # The comment also ends a physical line
- token = list(token)
- token[1] = text.rstrip('\r\n')
- token[3] = (token[2][0], token[2][1] + len(token[1]))
- self.tokens = [tuple(token)]
- self.check_logical()
- if self.tokens:
- self.check_physical(self.lines[-1])
- self.check_logical()
- return self.report.get_file_results()
-
-
-class BaseReport(object):
- """Collect the results of the checks."""
-
- print_filename = False
-
- def __init__(self, options):
- self._benchmark_keys = options.benchmark_keys
- self._ignore_code = options.ignore_code
- # Results
- self.elapsed = 0
- self.total_errors = 0
- self.counters = dict.fromkeys(self._benchmark_keys, 0)
- self.messages = {}
-
- def start(self):
- """Start the timer."""
- self._start_time = time.time()
-
- def stop(self):
- """Stop the timer."""
- self.elapsed = time.time() - self._start_time
-
- def init_file(self, filename, lines, expected, line_offset):
- """Signal a new file."""
- self.filename = filename
- self.lines = lines
- self.expected = expected or ()
- self.line_offset = line_offset
- self.file_errors = 0
- self.counters['files'] += 1
- self.counters['physical lines'] += len(lines)
-
- def increment_logical_line(self):
- """Signal a new logical line."""
- self.counters['logical lines'] += 1
-
- def error(self, line_number, offset, text, check):
- """Report an error, according to options."""
- code = text[:4]
- if self._ignore_code(code):
- return
- if code in self.counters:
- self.counters[code] += 1
- else:
- self.counters[code] = 1
- self.messages[code] = text[5:]
- # Don't care about expected errors or warnings
- if code in self.expected:
- return
- if self.print_filename and not self.file_errors:
- print(self.filename)
- self.file_errors += 1
- self.total_errors += 1
- return code
-
- def get_file_results(self):
- """Return the count of errors and warnings for this file."""
- return self.file_errors
-
- def get_count(self, prefix=''):
- """Return the total count of errors and warnings."""
- return sum([self.counters[key]
- for key in self.messages if key.startswith(prefix)])
-
- def get_statistics(self, prefix=''):
- """Get statistics for message codes that start with the prefix.
-
- prefix='' matches all errors and warnings
- prefix='E' matches all errors
- prefix='W' matches all warnings
- prefix='E4' matches all errors that have to do with imports
- """
- return ['%-7s %s %s' % (self.counters[key], key, self.messages[key])
- for key in sorted(self.messages) if key.startswith(prefix)]
-
- def print_statistics(self, prefix=''):
- """Print overall statistics (number of errors and warnings)."""
- for line in self.get_statistics(prefix):
- print(line)
-
- def print_benchmark(self):
- """Print benchmark numbers."""
- print('%-7.2f %s' % (self.elapsed, 'seconds elapsed'))
- if self.elapsed:
- for key in self._benchmark_keys:
- print('%-7d %s per second (%d total)' %
- (self.counters[key] / self.elapsed, key,
- self.counters[key]))
-
-
-class FileReport(BaseReport):
- """Collect the results of the checks and print only the filenames."""
- print_filename = True
-
-
-class StandardReport(BaseReport):
- """Collect and print the results of the checks."""
-
- def __init__(self, options):
- super(StandardReport, self).__init__(options)
- self._fmt = REPORT_FORMAT.get(options.format.lower(),
- options.format)
- self._repeat = options.repeat
- self._show_source = options.show_source
- self._show_pep8 = options.show_pep8
-
- def init_file(self, filename, lines, expected, line_offset):
- """Signal a new file."""
- self._deferred_print = []
- return super(StandardReport, self).init_file(
- filename, lines, expected, line_offset)
-
- def error(self, line_number, offset, text, check):
- """Report an error, according to options."""
- code = super(StandardReport, self).error(line_number, offset,
- text, check)
- if code and (self.counters[code] == 1 or self._repeat):
- self._deferred_print.append(
- (line_number, offset, code, text[5:], check.__doc__))
- return code
-
- def get_file_results(self):
- """Print the result and return the overall count for this file."""
- self._deferred_print.sort()
- for line_number, offset, code, text, doc in self._deferred_print:
- print(self._fmt % {
- 'path': self.filename,
- 'row': self.line_offset + line_number, 'col': offset + 1,
- 'code': code, 'text': text,
- })
- if self._show_source:
- if line_number > len(self.lines):
- line = ''
- else:
- line = self.lines[line_number - 1]
- print(line.rstrip())
- print(re.sub(r'\S', ' ', line[:offset]) + '^')
- if self._show_pep8 and doc:
- print(' ' + doc.strip())
- return self.file_errors
-
-
-class DiffReport(StandardReport):
- """Collect and print the results for the changed lines only."""
-
- def __init__(self, options):
- super(DiffReport, self).__init__(options)
- self._selected = options.selected_lines
-
- def error(self, line_number, offset, text, check):
- if line_number not in self._selected[self.filename]:
- return
- return super(DiffReport, self).error(line_number, offset, text, check)
-
-
-class StyleGuide(object):
- """Initialize a PEP-8 instance with few options."""
-
- def __init__(self, *args, **kwargs):
- # build options from the command line
- self.checker_class = kwargs.pop('checker_class', Checker)
- parse_argv = kwargs.pop('parse_argv', False)
- config_file = kwargs.pop('config_file', None)
- parser = kwargs.pop('parser', None)
- # build options from dict
- options_dict = dict(*args, **kwargs)
- arglist = None if parse_argv else options_dict.get('paths', None)
- options, self.paths = process_options(
- arglist, parse_argv, config_file, parser)
- if options_dict:
- options.__dict__.update(options_dict)
- if 'paths' in options_dict:
- self.paths = options_dict['paths']
-
- self.runner = self.input_file
- self.options = options
-
- if not options.reporter:
- options.reporter = BaseReport if options.quiet else StandardReport
-
- options.select = tuple(options.select or ())
- if not (options.select or options.ignore or
- options.testsuite or options.doctest) and DEFAULT_IGNORE:
- # The default choice: ignore controversial checks
- options.ignore = tuple(DEFAULT_IGNORE.split(','))
- else:
- # Ignore all checks which are not explicitly selected
- options.ignore = ('',) if options.select else tuple(options.ignore)
- options.benchmark_keys = BENCHMARK_KEYS[:]
- options.ignore_code = self.ignore_code
- options.physical_checks = self.get_checks('physical_line')
- options.logical_checks = self.get_checks('logical_line')
- options.ast_checks = self.get_checks('tree')
- self.init_report()
-
- def init_report(self, reporter=None):
- """Initialize the report instance."""
- self.options.report = (reporter or self.options.reporter)(self.options)
- return self.options.report
-
- def check_files(self, paths=None):
- """Run all checks on the paths."""
- if paths is None:
- paths = self.paths
- report = self.options.report
- runner = self.runner
- report.start()
- try:
- for path in paths:
- if os.path.isdir(path):
- self.input_dir(path)
- elif not self.excluded(path):
- runner(path)
- except KeyboardInterrupt:
- print('... stopped')
- report.stop()
- return report
-
- def input_file(self, filename, lines=None, expected=None, line_offset=0):
- """Run all checks on a Python source file."""
- if self.options.verbose:
- print('checking %s' % filename)
- fchecker = self.checker_class(
- filename, lines=lines, options=self.options)
- return fchecker.check_all(expected=expected, line_offset=line_offset)
-
- def input_dir(self, dirname):
- """Check all files in this directory and all subdirectories."""
- dirname = dirname.rstrip('/')
- if self.excluded(dirname):
- return 0
- counters = self.options.report.counters
- verbose = self.options.verbose
- filepatterns = self.options.filename
- runner = self.runner
- for root, dirs, files in os.walk(dirname):
- if verbose:
- print('directory ' + root)
- counters['directories'] += 1
- for subdir in sorted(dirs):
- if self.excluded(subdir, root):
- dirs.remove(subdir)
- for filename in sorted(files):
- # contain a pattern that matches?
- if ((filename_match(filename, filepatterns) and
- not self.excluded(filename, root))):
- runner(os.path.join(root, filename))
-
- def excluded(self, filename, parent=None):
- """Check if the file should be excluded.
-
- Check if 'options.exclude' contains a pattern that matches filename.
- """
- if not self.options.exclude:
- return False
- basename = os.path.basename(filename)
- if filename_match(basename, self.options.exclude):
- return True
- if parent:
- filename = os.path.join(parent, filename)
- filename = os.path.abspath(filename)
- return filename_match(filename, self.options.exclude)
-
- def ignore_code(self, code):
- """Check if the error code should be ignored.
-
- If 'options.select' contains a prefix of the error code,
- return False. Else, if 'options.ignore' contains a prefix of
- the error code, return True.
- """
- if len(code) < 4 and any(s.startswith(code)
- for s in self.options.select):
- return False
- return (code.startswith(self.options.ignore) and
- not code.startswith(self.options.select))
-
- def get_checks(self, argument_name):
- """Get all the checks for this category.
-
- Find all globally visible functions where the first argument name
- starts with argument_name and which contain selected tests.
- """
- checks = []
- for check, attrs in _checks[argument_name].items():
- (codes, args) = attrs
- if any(not (code and self.ignore_code(code)) for code in codes):
- checks.append((check.__name__, check, args))
- return sorted(checks)
-
-
-def get_parser(prog='pep8', version=__version__):
- parser = OptionParser(prog=prog, version=version,
- usage="%prog [options] input ...")
- parser.config_options = [
- 'exclude', 'filename', 'select', 'ignore', 'max-line-length',
- 'hang-closing', 'count', 'format', 'quiet', 'show-pep8',
- 'show-source', 'statistics', 'verbose']
- parser.add_option('-v', '--verbose', default=0, action='count',
- help="print status messages, or debug with -vv")
- parser.add_option('-q', '--quiet', default=0, action='count',
- help="report only file names, or nothing with -qq")
- parser.add_option('-r', '--repeat', default=True, action='store_true',
- help="(obsolete) show all occurrences of the same error")
- parser.add_option('--first', action='store_false', dest='repeat',
- help="show first occurrence of each error")
- parser.add_option('--exclude', metavar='patterns', default=DEFAULT_EXCLUDE,
- help="exclude files or directories which match these "
- "comma separated patterns (default: %default)")
- parser.add_option('--filename', metavar='patterns', default='*.py',
- help="when parsing directories, only check filenames "
- "matching these comma separated patterns "
- "(default: %default)")
- parser.add_option('--select', metavar='errors', default='',
- help="select errors and warnings (e.g. E,W6)")
- parser.add_option('--ignore', metavar='errors', default='',
- help="skip errors and warnings (e.g. E4,W)")
- parser.add_option('--show-source', action='store_true',
- help="show source code for each error")
- parser.add_option('--show-pep8', action='store_true',
- help="show text of PEP 8 for each error "
- "(implies --first)")
- parser.add_option('--statistics', action='store_true',
- help="count errors and warnings")
- parser.add_option('--count', action='store_true',
- help="print total number of errors and warnings "
- "to standard error and set exit code to 1 if "
- "total is not null")
- parser.add_option('--max-line-length', type='int', metavar='n',
- default=MAX_LINE_LENGTH,
- help="set maximum allowed line length "
- "(default: %default)")
- parser.add_option('--hang-closing', action='store_true',
- help="hang closing bracket instead of matching "
- "indentation of opening bracket's line")
- parser.add_option('--format', metavar='format', default='default',
- help="set the error format [default|pylint|<custom>]")
- parser.add_option('--diff', action='store_true',
- help="report only lines changed according to the "
- "unified diff received on STDIN")
- group = parser.add_option_group("Testing Options")
- if os.path.exists(TESTSUITE_PATH):
- group.add_option('--testsuite', metavar='dir',
- help="run regression tests from dir")
- group.add_option('--doctest', action='store_true',
- help="run doctest on myself")
- group.add_option('--benchmark', action='store_true',
- help="measure processing speed")
- return parser
-
-
-def read_config(options, args, arglist, parser):
- """Read both user configuration and local configuration."""
- config = RawConfigParser()
-
- user_conf = options.config
- if user_conf and os.path.isfile(user_conf):
- if options.verbose:
- print('user configuration: %s' % user_conf)
- config.read(user_conf)
-
- local_dir = os.curdir
- parent = tail = args and os.path.abspath(os.path.commonprefix(args))
- while tail:
- if config.read([os.path.join(parent, fn) for fn in PROJECT_CONFIG]):
- local_dir = parent
- if options.verbose:
- print('local configuration: in %s' % parent)
- break
- (parent, tail) = os.path.split(parent)
-
- pep8_section = parser.prog
- if config.has_section(pep8_section):
- option_list = dict([(o.dest, o.type or o.action)
- for o in parser.option_list])
-
- # First, read the default values
- (new_options, __) = parser.parse_args([])
-
- # Second, parse the configuration
- for opt in config.options(pep8_section):
- if opt.replace('_', '-') not in parser.config_options:
- print(" unknown option '%s' ignored" % opt)
- continue
- if options.verbose > 1:
- print(" %s = %s" % (opt, config.get(pep8_section, opt)))
- normalized_opt = opt.replace('-', '_')
- opt_type = option_list[normalized_opt]
- if opt_type in ('int', 'count'):
- value = config.getint(pep8_section, opt)
- elif opt_type == 'string':
- value = config.get(pep8_section, opt)
- if normalized_opt == 'exclude':
- value = normalize_paths(value, local_dir)
- else:
- assert opt_type in ('store_true', 'store_false')
- value = config.getboolean(pep8_section, opt)
- setattr(new_options, normalized_opt, value)
-
- # Third, overwrite with the command-line options
- (options, __) = parser.parse_args(arglist, values=new_options)
- options.doctest = options.testsuite = False
- return options
-
-
-def process_options(arglist=None, parse_argv=False, config_file=None,
- parser=None):
- """Process options passed either via arglist or via command line args."""
- if not parser:
- parser = get_parser()
- if not parser.has_option('--config'):
- if config_file is True:
- config_file = DEFAULT_CONFIG
- group = parser.add_option_group("Configuration", description=(
- "The project options are read from the [%s] section of the "
- "tox.ini file or the setup.cfg file located in any parent folder "
- "of the path(s) being processed. Allowed options are: %s." %
- (parser.prog, ', '.join(parser.config_options))))
- group.add_option('--config', metavar='path', default=config_file,
- help="user config file location (default: %default)")
- # Don't read the command line if the module is used as a library.
- if not arglist and not parse_argv:
- arglist = []
- # If parse_argv is True and arglist is None, arguments are
- # parsed from the command line (sys.argv)
- (options, args) = parser.parse_args(arglist)
- options.reporter = None
-
- if options.ensure_value('testsuite', False):
- args.append(options.testsuite)
- elif not options.ensure_value('doctest', False):
- if parse_argv and not args:
- if options.diff or any(os.path.exists(name)
- for name in PROJECT_CONFIG):
- args = ['.']
- else:
- parser.error('input not specified')
- options = read_config(options, args, arglist, parser)
- options.reporter = parse_argv and options.quiet == 1 and FileReport
-
- options.filename = options.filename and options.filename.split(',')
- options.exclude = normalize_paths(options.exclude)
- options.select = options.select and options.select.split(',')
- options.ignore = options.ignore and options.ignore.split(',')
-
- if options.diff:
- options.reporter = DiffReport
- stdin = stdin_get_value()
- options.selected_lines = parse_udiff(stdin, options.filename, args[0])
- args = sorted(options.selected_lines)
-
- return options, args
-
-
-def _main():
- """Parse options and run checks on Python source."""
- import signal
-
- # Handle "Broken pipe" gracefully
- try:
- signal.signal(signal.SIGPIPE, lambda signum, frame: sys.exit(1))
- except AttributeError:
- pass # not supported on Windows
-
- pep8style = StyleGuide(parse_argv=True, config_file=True)
- options = pep8style.options
- if options.doctest or options.testsuite:
- from testsuite.support import run_tests
- report = run_tests(pep8style)
- else:
- report = pep8style.check_files()
- if options.statistics:
- report.print_statistics()
- if options.benchmark:
- report.print_benchmark()
- if options.testsuite and not options.quiet:
- report.print_results()
- if report.total_errors:
- if options.count:
- sys.stderr.write(str(report.total_errors) + '\n')
- sys.exit(1)
-
-if __name__ == '__main__':
- _main()
diff --git a/lib/update-external.sh b/lib/update-external.sh
index e3d83d5..874d545 100755
--- a/lib/update-external.sh
+++ b/lib/update-external.sh
@@ -6,7 +6,6 @@
THIRD_PARTY_DIR="`dirname $0`/../third_party"
# Library directory where projects live that haven't been migrated to
# $THIRD_PARTY_DIR yet.
-LIBDIR="`dirname $0`"
WORKDIR="`mktemp -d`"
echo "Updating subunit..."
@@ -29,7 +28,7 @@ rsync -avz --delete "$WORKDIR/dnspython/" "$THIRD_PARTY_DIR/dnspython/"
echo "Updating pep8..."
git clone git://github.com/jcrocholl/pep8 "$WORKDIR/pep8"
rm -rf "$WORKDIR/pep8/.git"
-rsync -avz --delete "$WORKDIR/pep8/" "$LIBDIR/pep8/"
+rsync -avz --delete "$WORKDIR/pep8/" "$THIRD_PARTY_DIR/pep8/"
echo "Updating zlib..."
git clone git://github.com/madler/zlib "$WORKDIR/zlib"
diff --git a/third_party/pep8/pep8.py b/third_party/pep8/pep8.py
new file mode 100755
index 0000000..b31a978
--- /dev/null
+++ b/third_party/pep8/pep8.py
@@ -0,0 +1,1959 @@
+#!/usr/bin/env python
+# pep8.py - Check Python source code formatting, according to PEP 8
+# Copyright (C) 2006-2009 Johann C. Rocholl <johann at rocholl.net>
+# Copyright (C) 2009-2014 Florent Xicluna <florent.xicluna at gmail.com>
+#
+# Permission is hereby granted, free of charge, to any person
+# obtaining a copy of this software and associated documentation files
+# (the "Software"), to deal in the Software without restriction,
+# including without limitation the rights to use, copy, modify, merge,
+# publish, distribute, sublicense, and/or sell copies of the Software,
+# and to permit persons to whom the Software is furnished to do so,
+# subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+r"""
+Check Python source code formatting, according to PEP 8.
+
+For usage and a list of options, try this:
+$ python pep8.py -h
+
+This program and its regression test suite live here:
+http://github.com/jcrocholl/pep8
+
+Groups of errors and warnings:
+E errors
+W warnings
+100 indentation
+200 whitespace
+300 blank lines
+400 imports
+500 line length
+600 deprecation
+700 statements
+900 syntax error
+"""
+from __future__ import with_statement
+
+__version__ = '1.6.0a0'
+
+import os
+import sys
+import re
+import time
+import inspect
+import keyword
+import tokenize
+from optparse import OptionParser
+from fnmatch import fnmatch
+try:
+ from configparser import RawConfigParser
+ from io import TextIOWrapper
+except ImportError:
+ from ConfigParser import RawConfigParser
+
+DEFAULT_EXCLUDE = '.svn,CVS,.bzr,.hg,.git,__pycache__'
+DEFAULT_IGNORE = 'E123,E226,E24,E704'
+if sys.platform == 'win32':
+ DEFAULT_CONFIG = os.path.expanduser(r'~\.pep8')
+else:
+ DEFAULT_CONFIG = os.path.join(os.getenv('XDG_CONFIG_HOME') or
+ os.path.expanduser('~/.config'), 'pep8')
+PROJECT_CONFIG = ('setup.cfg', 'tox.ini', '.pep8')
+TESTSUITE_PATH = os.path.join(os.path.dirname(__file__), 'testsuite')
+MAX_LINE_LENGTH = 79
+REPORT_FORMAT = {
+ 'default': '%(path)s:%(row)d:%(col)d: %(code)s %(text)s',
+ 'pylint': '%(path)s:%(row)d: [%(code)s] %(text)s',
+}
+
+PyCF_ONLY_AST = 1024
+SINGLETONS = frozenset(['False', 'None', 'True'])
+KEYWORDS = frozenset(keyword.kwlist + ['print']) - SINGLETONS
+UNARY_OPERATORS = frozenset(['>>', '**', '*', '+', '-'])
+ARITHMETIC_OP = frozenset(['**', '*', '/', '//', '+', '-'])
+WS_OPTIONAL_OPERATORS = ARITHMETIC_OP.union(['^', '&', '|', '<<', '>>', '%'])
+WS_NEEDED_OPERATORS = frozenset([
+ '**=', '*=', '/=', '//=', '+=', '-=', '!=', '<>', '<', '>',
+ '%=', '^=', '&=', '|=', '==', '<=', '>=', '<<=', '>>=', '='])
+WHITESPACE = frozenset(' \t')
+NEWLINE = frozenset([tokenize.NL, tokenize.NEWLINE])
+SKIP_TOKENS = NEWLINE.union([tokenize.INDENT, tokenize.DEDENT])
+# ERRORTOKEN is triggered by backticks in Python 3
+SKIP_COMMENTS = SKIP_TOKENS.union([tokenize.COMMENT, tokenize.ERRORTOKEN])
+BENCHMARK_KEYS = ['directories', 'files', 'logical lines', 'physical lines']
+
+INDENT_REGEX = re.compile(r'([ \t]*)')
+RAISE_COMMA_REGEX = re.compile(r'raise\s+\w+\s*,')
+RERAISE_COMMA_REGEX = re.compile(r'raise\s+\w+\s*,.*,\s*\w+\s*$')
+ERRORCODE_REGEX = re.compile(r'\b[A-Z]\d{3}\b')
+DOCSTRING_REGEX = re.compile(r'u?r?["\']')
+EXTRANEOUS_WHITESPACE_REGEX = re.compile(r'[[({] | []}),;:]')
+WHITESPACE_AFTER_COMMA_REGEX = re.compile(r'[,;:]\s*(?: |\t)')
+COMPARE_SINGLETON_REGEX = re.compile(r'([=!]=)\s*(None|False|True)')
+COMPARE_NEGATIVE_REGEX = re.compile(r'\b(not)\s+[^[({ ]+\s+(in|is)\s')
+COMPARE_TYPE_REGEX = re.compile(r'(?:[=!]=|is(?:\s+not)?)\s*type(?:s.\w+Type'
+ r'|\s*\(\s*([^)]*[^ )])\s*\))')
+KEYWORD_REGEX = re.compile(r'(\s*)\b(?:%s)\b(\s*)' % r'|'.join(KEYWORDS))
+OPERATOR_REGEX = re.compile(r'(?:[^,\s])(\s*)(?:[-+*/|!<=>%&^]+)(\s*)')
+LAMBDA_REGEX = re.compile(r'\blambda\b')
+HUNK_REGEX = re.compile(r'^@@ -\d+(?:,\d+)? \+(\d+)(?:,(\d+))? @@.*$')
+
+# Work around Python < 2.6 behaviour, which does not generate NL after
+# a comment which is on a line by itself.
+COMMENT_WITH_NL = tokenize.generate_tokens(['#\n'].pop).send(None)[1] == '#\n'
+
+
+##############################################################################
+# Plugins (check functions) for physical lines
+##############################################################################
+
+
+def tabs_or_spaces(physical_line, indent_char):
+ r"""Never mix tabs and spaces.
+
+ The most popular way of indenting Python is with spaces only. The
+ second-most popular way is with tabs only. Code indented with a mixture
+ of tabs and spaces should be converted to using spaces exclusively. When
+ invoking the Python command line interpreter with the -t option, it issues
+ warnings about code that illegally mixes tabs and spaces. When using -tt
+ these warnings become errors. These options are highly recommended!
+
+ Okay: if a == 0:\n a = 1\n b = 1
+ E101: if a == 0:\n a = 1\n\tb = 1
+ """
+ indent = INDENT_REGEX.match(physical_line).group(1)
+ for offset, char in enumerate(indent):
+ if char != indent_char:
+ return offset, "E101 indentation contains mixed spaces and tabs"
+
+
+def tabs_obsolete(physical_line):
+ r"""For new projects, spaces-only are strongly recommended over tabs.
+
+ Okay: if True:\n return
+ W191: if True:\n\treturn
+ """
+ indent = INDENT_REGEX.match(physical_line).group(1)
+ if '\t' in indent:
+ return indent.index('\t'), "W191 indentation contains tabs"
+
+
+def trailing_whitespace(physical_line):
+ r"""Trailing whitespace is superfluous.
+
+ The warning returned varies on whether the line itself is blank, for easier
+ filtering for those who want to indent their blank lines.
+
+ Okay: spam(1)\n#
+ W291: spam(1) \n#
+ W293: class Foo(object):\n \n bang = 12
+ """
+ physical_line = physical_line.rstrip('\n') # chr(10), newline
+ physical_line = physical_line.rstrip('\r') # chr(13), carriage return
+ physical_line = physical_line.rstrip('\x0c') # chr(12), form feed, ^L
+ stripped = physical_line.rstrip(' \t\v')
+ if physical_line != stripped:
+ if stripped:
+ return len(stripped), "W291 trailing whitespace"
+ else:
+ return 0, "W293 blank line contains whitespace"
+
+
+def trailing_blank_lines(physical_line, lines, line_number, total_lines):
+ r"""Trailing blank lines are superfluous.
+
+ Okay: spam(1)
+ W391: spam(1)\n
+
+ However the last line should end with a new line (warning W292).
+ """
+ if line_number == total_lines:
+ stripped_last_line = physical_line.rstrip()
+ if not stripped_last_line:
+ return 0, "W391 blank line at end of file"
+ if stripped_last_line == physical_line:
+ return len(physical_line), "W292 no newline at end of file"
+
+
+def maximum_line_length(physical_line, max_line_length, multiline):
+ r"""Limit all lines to a maximum of 79 characters.
+
+ There are still many devices around that are limited to 80 character
+ lines; plus, limiting windows to 80 characters makes it possible to have
+ several windows side-by-side. The default wrapping on such devices looks
+ ugly. Therefore, please limit all lines to a maximum of 79 characters.
+ For flowing long blocks of text (docstrings or comments), limiting the
+ length to 72 characters is recommended.
+
+ Reports error E501.
+ """
+ line = physical_line.rstrip()
+ length = len(line)
+ if length > max_line_length and not noqa(line):
+ # Special case for long URLs in multi-line docstrings or comments,
+ # but still report the error when the 72 first chars are whitespaces.
+ chunks = line.split()
+ if ((len(chunks) == 1 and multiline) or
+ (len(chunks) == 2 and chunks[0] == '#')) and \
+ len(line) - len(chunks[-1]) < max_line_length - 7:
+ return
+ if hasattr(line, 'decode'): # Python 2
+ # The line could contain multi-byte characters
+ try:
+ length = len(line.decode('utf-8'))
+ except UnicodeError:
+ pass
+ if length > max_line_length:
+ return (max_line_length, "E501 line too long "
+ "(%d > %d characters)" % (length, max_line_length))
+
+
+##############################################################################
+# Plugins (check functions) for logical lines
+##############################################################################
+
+
+def blank_lines(logical_line, blank_lines, indent_level, line_number,
+ blank_before, previous_logical, previous_indent_level):
+ r"""Separate top-level function and class definitions with two blank lines.
+
+ Method definitions inside a class are separated by a single blank line.
+
+ Extra blank lines may be used (sparingly) to separate groups of related
+ functions. Blank lines may be omitted between a bunch of related
+ one-liners (e.g. a set of dummy implementations).
+
+ Use blank lines in functions, sparingly, to indicate logical sections.
+
+ Okay: def a():\n pass\n\n\ndef b():\n pass
+ Okay: def a():\n pass\n\n\n# Foo\n# Bar\n\ndef b():\n pass
+
+ E301: class Foo:\n b = 0\n def bar():\n pass
+ E302: def a():\n pass\n\ndef b(n):\n pass
+ E303: def a():\n pass\n\n\n\ndef b(n):\n pass
+ E303: def a():\n\n\n\n pass
+ E304: @decorator\n\ndef a():\n pass
+ """
+ if line_number < 3 and not previous_logical:
+ return # Don't expect blank lines before the first line
+ if previous_logical.startswith('@'):
+ if blank_lines:
+ yield 0, "E304 blank lines found after function decorator"
+ elif blank_lines > 2 or (indent_level and blank_lines == 2):
+ yield 0, "E303 too many blank lines (%d)" % blank_lines
+ elif logical_line.startswith(('def ', 'class ', '@')):
+ if indent_level:
+ if not (blank_before or previous_indent_level < indent_level or
+ DOCSTRING_REGEX.match(previous_logical)):
+ yield 0, "E301 expected 1 blank line, found 0"
+ elif blank_before != 2:
+ yield 0, "E302 expected 2 blank lines, found %d" % blank_before
+
+
+def extraneous_whitespace(logical_line):
+ r"""Avoid extraneous whitespace.
+
+ Avoid extraneous whitespace in these situations:
+ - Immediately inside parentheses, brackets or braces.
+ - Immediately before a comma, semicolon, or colon.
+
+ Okay: spam(ham[1], {eggs: 2})
+ E201: spam( ham[1], {eggs: 2})
+ E201: spam(ham[ 1], {eggs: 2})
+ E201: spam(ham[1], { eggs: 2})
+ E202: spam(ham[1], {eggs: 2} )
+ E202: spam(ham[1 ], {eggs: 2})
+ E202: spam(ham[1], {eggs: 2 })
+
+ E203: if x == 4: print x, y; x, y = y , x
+ E203: if x == 4: print x, y ; x, y = y, x
+ E203: if x == 4 : print x, y; x, y = y, x
+ """
+ line = logical_line
+ for match in EXTRANEOUS_WHITESPACE_REGEX.finditer(line):
+ text = match.group()
+ char = text.strip()
+ found = match.start()
+ if text == char + ' ':
+ # assert char in '([{'
+ yield found + 1, "E201 whitespace after '%s'" % char
+ elif line[found - 1] != ',':
+ code = ('E202' if char in '}])' else 'E203') # if char in ',;:'
+ yield found, "%s whitespace before '%s'" % (code, char)
+
+
+def whitespace_around_keywords(logical_line):
+ r"""Avoid extraneous whitespace around keywords.
+
+ Okay: True and False
+ E271: True and False
+ E272: True and False
+ E273: True and\tFalse
+ E274: True\tand False
+ """
+ for match in KEYWORD_REGEX.finditer(logical_line):
+ before, after = match.groups()
+
+ if '\t' in before:
+ yield match.start(1), "E274 tab before keyword"
+ elif len(before) > 1:
+ yield match.start(1), "E272 multiple spaces before keyword"
+
+ if '\t' in after:
+ yield match.start(2), "E273 tab after keyword"
+ elif len(after) > 1:
+ yield match.start(2), "E271 multiple spaces after keyword"
+
+
+def missing_whitespace(logical_line):
+ r"""Each comma, semicolon or colon should be followed by whitespace.
+
+ Okay: [a, b]
+ Okay: (3,)
+ Okay: a[1:4]
+ Okay: a[:4]
+ Okay: a[1:]
+ Okay: a[1:4:2]
+ E231: ['a','b']
+ E231: foo(bar,baz)
+ E231: [{'a':'b'}]
+ """
+ line = logical_line
+ for index in range(len(line) - 1):
+ char = line[index]
+ if char in ',;:' and line[index + 1] not in WHITESPACE:
+ before = line[:index]
+ if char == ':' and before.count('[') > before.count(']') and \
+ before.rfind('{') < before.rfind('['):
+ continue # Slice syntax, no space required
+ if char == ',' and line[index + 1] == ')':
+ continue # Allow tuple with only one element: (3,)
+ yield index, "E231 missing whitespace after '%s'" % char
+
+
+def indentation(logical_line, previous_logical, indent_char,
+ indent_level, previous_indent_level):
+ r"""Use 4 spaces per indentation level.
+
+ For really old code that you don't want to mess up, you can continue to
+ use 8-space tabs.
+
+ Okay: a = 1
+ Okay: if a == 0:\n a = 1
+ E111: a = 1
+ E114: # a = 1
+
+ Okay: for item in items:\n pass
+ E112: for item in items:\npass
+ E115: for item in items:\n# Hi\n pass
+
+ Okay: a = 1\nb = 2
+ E113: a = 1\n b = 2
+ E116: a = 1\n # b = 2
+ """
+ c = 0 if logical_line else 3
+ tmpl = "E11%d %s" if logical_line else "E11%d %s (comment)"
+ if indent_level % 4:
+ yield 0, tmpl % (1 + c, "indentation is not a multiple of four")
+ indent_expect = previous_logical.endswith(':')
+ if indent_expect and indent_level <= previous_indent_level:
+ yield 0, tmpl % (2 + c, "expected an indented block")
+ elif not indent_expect and indent_level > previous_indent_level:
+ yield 0, tmpl % (3 + c, "unexpected indentation")
+
+
+def continued_indentation(logical_line, tokens, indent_level, hang_closing,
+ indent_char, noqa, verbose):
+ r"""Continuation lines indentation.
+
+ Continuation lines should align wrapped elements either vertically
+ using Python's implicit line joining inside parentheses, brackets
+ and braces, or using a hanging indent.
+
+ When using a hanging indent these considerations should be applied:
+ - there should be no arguments on the first line, and
+ - further indentation should be used to clearly distinguish itself as a
+ continuation line.
+
+ Okay: a = (\n)
+ E123: a = (\n )
+
+ Okay: a = (\n 42)
+ E121: a = (\n 42)
+ E122: a = (\n42)
+ E123: a = (\n 42\n )
+ E124: a = (24,\n 42\n)
+ E125: if (\n b):\n pass
+ E126: a = (\n 42)
+ E127: a = (24,\n 42)
+ E128: a = (24,\n 42)
+ E129: if (a or\n b):\n pass
+ E131: a = (\n 42\n 24)
+ """
+ first_row = tokens[0][2][0]
+ nrows = 1 + tokens[-1][2][0] - first_row
+ if noqa or nrows == 1:
+ return
+
+ # indent_next tells us whether the next block is indented; assuming
+ # that it is indented by 4 spaces, then we should not allow 4-space
+ # indents on the final continuation line; in turn, some other
+ # indents are allowed to have an extra 4 spaces.
+ indent_next = logical_line.endswith(':')
+
+ row = depth = 0
+ valid_hangs = (4,) if indent_char != '\t' else (4, 8)
+ # remember how many brackets were opened on each line
+ parens = [0] * nrows
+ # relative indents of physical lines
+ rel_indent = [0] * nrows
+ # for each depth, collect a list of opening rows
+ open_rows = [[0]]
+ # for each depth, memorize the hanging indentation
+ hangs = [None]
+ # visual indents
+ indent_chances = {}
+ last_indent = tokens[0][2]
+ visual_indent = None
+ # for each depth, memorize the visual indent column
+ indent = [last_indent[1]]
+ if verbose >= 3:
+ print(">>> " + tokens[0][4].rstrip())
+
+ for token_type, text, start, end, line in tokens:
+
+ newline = row < start[0] - first_row
+ if newline:
+ row = start[0] - first_row
+ newline = not last_token_multiline and token_type not in NEWLINE
+
+ if newline:
+ # this is the beginning of a continuation line.
+ last_indent = start
+ if verbose >= 3:
+ print("... " + line.rstrip())
+
+ # record the initial indent.
+ rel_indent[row] = expand_indent(line) - indent_level
+
+ # identify closing bracket
+ close_bracket = (token_type == tokenize.OP and text in ']})')
+
+ # is the indent relative to an opening bracket line?
+ for open_row in reversed(open_rows[depth]):
+ hang = rel_indent[row] - rel_indent[open_row]
+ hanging_indent = hang in valid_hangs
+ if hanging_indent:
+ break
+ if hangs[depth]:
+ hanging_indent = (hang == hangs[depth])
+ # is there any chance of visual indent?
+ visual_indent = (not close_bracket and hang > 0 and
+ indent_chances.get(start[1]))
+
+ if close_bracket and indent[depth]:
+ # closing bracket for visual indent
+ if start[1] != indent[depth]:
+ yield (start, "E124 closing bracket does not match "
+ "visual indentation")
+ elif close_bracket and not hang:
+ # closing bracket matches indentation of opening bracket's line
+ if hang_closing:
+ yield start, "E133 closing bracket is missing indentation"
+ elif indent[depth] and start[1] < indent[depth]:
+ if visual_indent is not True:
+ # visual indent is broken
+ yield (start, "E128 continuation line "
+ "under-indented for visual indent")
+ elif hanging_indent or (indent_next and rel_indent[row] == 8):
+ # hanging indent is verified
+ if close_bracket and not hang_closing:
+ yield (start, "E123 closing bracket does not match "
+ "indentation of opening bracket's line")
+ hangs[depth] = hang
+ elif visual_indent is True:
+ # visual indent is verified
+ indent[depth] = start[1]
+ elif visual_indent in (text, str):
+ # ignore token lined up with matching one from a previous line
+ pass
+ else:
+ # indent is broken
+ if hang <= 0:
+ error = "E122", "missing indentation or outdented"
+ elif indent[depth]:
+ error = "E127", "over-indented for visual indent"
+ elif not close_bracket and hangs[depth]:
+ error = "E131", "unaligned for hanging indent"
+ else:
+ hangs[depth] = hang
+ if hang > 4:
+ error = "E126", "over-indented for hanging indent"
+ else:
+ error = "E121", "under-indented for hanging indent"
+ yield start, "%s continuation line %s" % error
+
+ # look for visual indenting
+ if (parens[row] and token_type not in (tokenize.NL, tokenize.COMMENT)
+ and not indent[depth]):
+ indent[depth] = start[1]
+ indent_chances[start[1]] = True
+ if verbose >= 4:
+ print("bracket depth %s indent to %s" % (depth, start[1]))
+ # deal with implicit string concatenation
+ elif (token_type in (tokenize.STRING, tokenize.COMMENT) or
+ text in ('u', 'ur', 'b', 'br')):
+ indent_chances[start[1]] = str
+ # special case for the "if" statement because len("if (") == 4
+ elif not indent_chances and not row and not depth and text == 'if':
+ indent_chances[end[1] + 1] = True
+ elif text == ':' and line[end[1]:].isspace():
+ open_rows[depth].append(row)
+
+ # keep track of bracket depth
+ if token_type == tokenize.OP:
+ if text in '([{':
+ depth += 1
+ indent.append(0)
+ hangs.append(None)
+ if len(open_rows) == depth:
+ open_rows.append([])
+ open_rows[depth].append(row)
+ parens[row] += 1
+ if verbose >= 4:
+ print("bracket depth %s seen, col %s, visual min = %s" %
+ (depth, start[1], indent[depth]))
+ elif text in ')]}' and depth > 0:
+ # parent indents should not be more than this one
+ prev_indent = indent.pop() or last_indent[1]
+ hangs.pop()
+ for d in range(depth):
+ if indent[d] > prev_indent:
+ indent[d] = 0
+ for ind in list(indent_chances):
+ if ind >= prev_indent:
+ del indent_chances[ind]
+ del open_rows[depth + 1:]
+ depth -= 1
+ if depth:
+ indent_chances[indent[depth]] = True
+ for idx in range(row, -1, -1):
+ if parens[idx]:
+ parens[idx] -= 1
+ break
+ assert len(indent) == depth + 1
+ if start[1] not in indent_chances:
+ # allow to line up tokens
+ indent_chances[start[1]] = text
+
+ last_token_multiline = (start[0] != end[0])
+ if last_token_multiline:
+ rel_indent[end[0] - first_row] = rel_indent[row]
+
+ if indent_next and expand_indent(line) == indent_level + 4:
+ pos = (start[0], indent[0] + 4)
+ if visual_indent:
+ code = "E129 visually indented line"
+ else:
+ code = "E125 continuation line"
+ yield pos, "%s with same indent as next logical line" % code
+
+
+def whitespace_before_parameters(logical_line, tokens):
+ r"""Avoid extraneous whitespace.
+
+ Avoid extraneous whitespace in the following situations:
+ - before the open parenthesis that starts the argument list of a
+ function call.
+ - before the open parenthesis that starts an indexing or slicing.
+
+ Okay: spam(1)
+ E211: spam (1)
+
+ Okay: dict['key'] = list[index]
+ E211: dict ['key'] = list[index]
+ E211: dict['key'] = list [index]
+ """
+ prev_type, prev_text, __, prev_end, __ = tokens[0]
+ for index in range(1, len(tokens)):
+ token_type, text, start, end, __ = tokens[index]
+ if (token_type == tokenize.OP and
+ text in '([' and
+ start != prev_end and
+ (prev_type == tokenize.NAME or prev_text in '}])') and
+ # Syntax "class A (B):" is allowed, but avoid it
+ (index < 2 or tokens[index - 2][1] != 'class') and
+ # Allow "return (a.foo for a in range(5))"
+ not keyword.iskeyword(prev_text)):
+ yield prev_end, "E211 whitespace before '%s'" % text
+ prev_type = token_type
+ prev_text = text
+ prev_end = end
+
+
+def whitespace_around_operator(logical_line):
+ r"""Avoid extraneous whitespace around an operator.
+
+ Okay: a = 12 + 3
+ E221: a = 4 + 5
+ E222: a = 4 + 5
+ E223: a = 4\t+ 5
+ E224: a = 4 +\t5
+ """
+ for match in OPERATOR_REGEX.finditer(logical_line):
+ before, after = match.groups()
+
+ if '\t' in before:
+ yield match.start(1), "E223 tab before operator"
+ elif len(before) > 1:
+ yield match.start(1), "E221 multiple spaces before operator"
+
+ if '\t' in after:
+ yield match.start(2), "E224 tab after operator"
+ elif len(after) > 1:
+ yield match.start(2), "E222 multiple spaces after operator"
+
+
+def missing_whitespace_around_operator(logical_line, tokens):
+ r"""Surround operators with a single space on either side.
+
+ - Always surround these binary operators with a single space on
+ either side: assignment (=), augmented assignment (+=, -= etc.),
+ comparisons (==, <, >, !=, <=, >=, in, not in, is, is not),
+ Booleans (and, or, not).
+
+ - If operators with different priorities are used, consider adding
+ whitespace around the operators with the lowest priorities.
+
+ Okay: i = i + 1
+ Okay: submitted += 1
+ Okay: x = x * 2 - 1
+ Okay: hypot2 = x * x + y * y
+ Okay: c = (a + b) * (a - b)
+ Okay: foo(bar, key='word', *args, **kwargs)
+ Okay: alpha[:-i]
+
+ E225: i=i+1
+ E225: submitted +=1
+ E225: x = x /2 - 1
+ E225: z = x **y
+ E226: c = (a+b) * (a-b)
+ E226: hypot2 = x*x + y*y
+ E227: c = a|b
+ E228: msg = fmt%(errno, errmsg)
+ """
+ parens = 0
+ need_space = False
+ prev_type = tokenize.OP
+ prev_text = prev_end = None
+ for token_type, text, start, end, line in tokens:
+ if token_type in SKIP_COMMENTS:
+ continue
+ if text in ('(', 'lambda'):
+ parens += 1
+ elif text == ')':
+ parens -= 1
+ if need_space:
+ if start != prev_end:
+ # Found a (probably) needed space
+ if need_space is not True and not need_space[1]:
+ yield (need_space[0],
+ "E225 missing whitespace around operator")
+ need_space = False
+ elif text == '>' and prev_text in ('<', '-'):
+ # Tolerate the "<>" operator, even if running Python 3
+ # Deal with Python 3's annotated return value "->"
+ pass
+ else:
+ if need_space is True or need_space[1]:
+ # A needed trailing space was not found
+ yield prev_end, "E225 missing whitespace around operator"
+ else:
+ code, optype = 'E226', 'arithmetic'
+ if prev_text == '%':
+ code, optype = 'E228', 'modulo'
+ elif prev_text not in ARITHMETIC_OP:
+ code, optype = 'E227', 'bitwise or shift'
+ yield (need_space[0], "%s missing whitespace "
+ "around %s operator" % (code, optype))
+ need_space = False
+ elif token_type == tokenize.OP and prev_end is not None:
+ if text == '=' and parens:
+ # Allow keyword args or defaults: foo(bar=None).
+ pass
+ elif text in WS_NEEDED_OPERATORS:
+ need_space = True
+ elif text in UNARY_OPERATORS:
+ # Check if the operator is being used as a binary operator
+ # Allow unary operators: -123, -x, +1.
+ # Allow argument unpacking: foo(*args, **kwargs).
+ if (prev_text in '}])' if prev_type == tokenize.OP
+ else prev_text not in KEYWORDS):
+ need_space = None
+ elif text in WS_OPTIONAL_OPERATORS:
+ need_space = None
+
+ if need_space is None:
+ # Surrounding space is optional, but ensure that
+ # trailing space matches opening space
+ need_space = (prev_end, start != prev_end)
+ elif need_space and start == prev_end:
+ # A needed opening space was not found
+ yield prev_end, "E225 missing whitespace around operator"
+ need_space = False
+ prev_type = token_type
+ prev_text = text
+ prev_end = end
+
+
+def whitespace_around_comma(logical_line):
+ r"""Avoid extraneous whitespace after a comma or a colon.
+
+ Note: these checks are disabled by default
+
+ Okay: a = (1, 2)
+ E241: a = (1, 2)
+ E242: a = (1,\t2)
+ """
+ line = logical_line
+ for m in WHITESPACE_AFTER_COMMA_REGEX.finditer(line):
+ found = m.start() + 1
+ if '\t' in m.group():
+ yield found, "E242 tab after '%s'" % m.group()[0]
+ else:
+ yield found, "E241 multiple spaces after '%s'" % m.group()[0]
+
+
+def whitespace_around_named_parameter_equals(logical_line, tokens):
+ r"""Don't use spaces around the '=' sign in function arguments.
+
+ Don't use spaces around the '=' sign when used to indicate a
+ keyword argument or a default parameter value.
+
+ Okay: def complex(real, imag=0.0):
+ Okay: return magic(r=real, i=imag)
+ Okay: boolean(a == b)
+ Okay: boolean(a != b)
+ Okay: boolean(a <= b)
+ Okay: boolean(a >= b)
+
+ E251: def complex(real, imag = 0.0):
+ E251: return magic(r = real, i = imag)
+ """
+ parens = 0
+ no_space = False
+ prev_end = None
+ message = "E251 unexpected spaces around keyword / parameter equals"
+ for token_type, text, start, end, line in tokens:
+ if token_type == tokenize.NL:
+ continue
+ if no_space:
+ no_space = False
+ if start != prev_end:
+ yield (prev_end, message)
+ elif token_type == tokenize.OP:
+ if text == '(':
+ parens += 1
+ elif text == ')':
+ parens -= 1
+ elif parens and text == '=':
+ no_space = True
+ if start != prev_end:
+ yield (prev_end, message)
+ prev_end = end
+
+
+def whitespace_before_comment(logical_line, tokens):
+ r"""Separate inline comments by at least two spaces.
+
+ An inline comment is a comment on the same line as a statement. Inline
+ comments should be separated by at least two spaces from the statement.
+ They should start with a # and a single space.
+
+ Each line of a block comment starts with a # and a single space
+ (unless it is indented text inside the comment).
+
+ Okay: x = x + 1 # Increment x
+ Okay: x = x + 1 # Increment x
+ Okay: # Block comment
+ E261: x = x + 1 # Increment x
+ E262: x = x + 1 #Increment x
+ E262: x = x + 1 # Increment x
+ E265: #Block comment
+ E266: ### Block comment
+ """
+ prev_end = (0, 0)
+ for token_type, text, start, end, line in tokens:
+ if token_type == tokenize.COMMENT:
+ inline_comment = line[:start[1]].strip()
+ if inline_comment:
+ if prev_end[0] == start[0] and start[1] < prev_end[1] + 2:
+ yield (prev_end,
+ "E261 at least two spaces before inline comment")
+ symbol, sp, comment = text.partition(' ')
+ bad_prefix = symbol not in '#:' and (symbol.lstrip('#')[:1] or '#')
+ if inline_comment:
+ if bad_prefix or comment[:1] in WHITESPACE:
+ yield start, "E262 inline comment should start with '# '"
+ elif bad_prefix and (bad_prefix != '!' or start[0] > 1):
+ if bad_prefix != '#':
+ yield start, "E265 block comment should start with '# '"
+ elif comment:
+ yield start, "E266 too many leading '#' for block comment"
+ elif token_type != tokenize.NL:
+ prev_end = end
+
+
+def imports_on_separate_lines(logical_line):
+ r"""Imports should usually be on separate lines.
+
+ Okay: import os\nimport sys
+ E401: import sys, os
+
+ Okay: from subprocess import Popen, PIPE
+ Okay: from myclas import MyClass
+ Okay: from foo.bar.yourclass import YourClass
+ Okay: import myclass
+ Okay: import foo.bar.yourclass
+ """
+ line = logical_line
+ if line.startswith('import '):
+ found = line.find(',')
+ if -1 < found and ';' not in line[:found]:
+ yield found, "E401 multiple imports on one line"
+
+
+def compound_statements(logical_line):
+ r"""Compound statements (on the same line) are generally discouraged.
+
+ While sometimes it's okay to put an if/for/while with a small body
+ on the same line, never do this for multi-clause statements.
+ Also avoid folding such long lines!
+
+ Always use a def statement instead of an assignment statement that
+ binds a lambda expression directly to a name.
+
+ Okay: if foo == 'blah':\n do_blah_thing()
+ Okay: do_one()
+ Okay: do_two()
+ Okay: do_three()
+
+ E701: if foo == 'blah': do_blah_thing()
+ E701: for x in lst: total += x
+ E701: while t < 10: t = delay()
+ E701: if foo == 'blah': do_blah_thing()
+ E701: else: do_non_blah_thing()
+ E701: try: something()
+ E701: finally: cleanup()
+ E701: if foo == 'blah': one(); two(); three()
+ E702: do_one(); do_two(); do_three()
+ E703: do_four(); # useless semicolon
+ E704: def f(x): return 2*x
+ E731: f = lambda x: 2*x
+ """
+ line = logical_line
+ last_char = len(line) - 1
+ found = line.find(':')
+ while -1 < found < last_char:
+ before = line[:found]
+ if ((before.count('{') <= before.count('}') and # {'a': 1} (dict)
+ before.count('[') <= before.count(']') and # [1:2] (slice)
+ before.count('(') <= before.count(')'))): # (annotation)
+ if LAMBDA_REGEX.search(before):
+ yield 0, "E731 do not assign a lambda expression, use a def"
+ break
+ if before.startswith('def '):
+ yield 0, "E704 multiple statements on one line (def)"
+ else:
+ yield found, "E701 multiple statements on one line (colon)"
+ found = line.find(':', found + 1)
+ found = line.find(';')
+ while -1 < found:
+ if found < last_char:
+ yield found, "E702 multiple statements on one line (semicolon)"
+ else:
+ yield found, "E703 statement ends with a semicolon"
+ found = line.find(';', found + 1)
+
+
+def explicit_line_join(logical_line, tokens):
+ r"""Avoid explicit line join between brackets.
+
+ The preferred way of wrapping long lines is by using Python's implied line
+ continuation inside parentheses, brackets and braces. Long lines can be
+ broken over multiple lines by wrapping expressions in parentheses. These
+ should be used in preference to using a backslash for line continuation.
+
+ E502: aaa = [123, \\n 123]
+ E502: aaa = ("bbb " \\n "ccc")
+
+ Okay: aaa = [123,\n 123]
+ Okay: aaa = ("bbb "\n "ccc")
+ Okay: aaa = "bbb " \\n "ccc"
+ """
+ prev_start = prev_end = parens = 0
+ for token_type, text, start, end, line in tokens:
+ if start[0] != prev_start and parens and backslash:
+ yield backslash, "E502 the backslash is redundant between brackets"
+ if end[0] != prev_end:
+ if line.rstrip('\r\n').endswith('\\'):
+ backslash = (end[0], len(line.splitlines()[-1]) - 1)
+ else:
+ backslash = None
+ prev_start = prev_end = end[0]
+ else:
+ prev_start = start[0]
+ if token_type == tokenize.OP:
+ if text in '([{':
+ parens += 1
+ elif text in ')]}':
+ parens -= 1
+
+
+def comparison_to_singleton(logical_line, noqa):
+ r"""Comparison to singletons should use "is" or "is not".
+
+ Comparisons to singletons like None should always be done
+ with "is" or "is not", never the equality operators.
+
+ Okay: if arg is not None:
+ E711: if arg != None:
+ E712: if arg == True:
+
+ Also, beware of writing if x when you really mean if x is not None --
+ e.g. when testing whether a variable or argument that defaults to None was
+ set to some other value. The other value might have a type (such as a
+ container) that could be false in a boolean context!
+ """
+ match = not noqa and COMPARE_SINGLETON_REGEX.search(logical_line)
+ if match:
+ same = (match.group(1) == '==')
+ singleton = match.group(2)
+ msg = "'if cond is %s:'" % (('' if same else 'not ') + singleton)
+ if singleton in ('None',):
+ code = 'E711'
+ else:
+ code = 'E712'
+ nonzero = ((singleton == 'True' and same) or
+ (singleton == 'False' and not same))
+ msg += " or 'if %scond:'" % ('' if nonzero else 'not ')
+ yield match.start(1), ("%s comparison to %s should be %s" %
+ (code, singleton, msg))
+
+
+def comparison_negative(logical_line):
+ r"""Negative comparison should be done using "not in" and "is not".
+
+ Okay: if x not in y:\n pass
+ Okay: assert (X in Y or X is Z)
+ Okay: if not (X in Y):\n pass
+ Okay: zz = x is not y
+ E713: Z = not X in Y
+ E713: if not X.B in Y:\n pass
+ E714: if not X is Y:\n pass
+ E714: Z = not X.B is Y
+ """
+ match = COMPARE_NEGATIVE_REGEX.search(logical_line)
+ if match:
+ pos = match.start(1)
+ if match.group(2) == 'in':
+ yield pos, "E713 test for membership should be 'not in'"
+ else:
+ yield pos, "E714 test for object identity should be 'is not'"
+
+
+def comparison_type(logical_line):
+ r"""Object type comparisons should always use isinstance().
+
+ Do not compare types directly.
+
+ Okay: if isinstance(obj, int):
+ E721: if type(obj) is type(1):
+
+ When checking if an object is a string, keep in mind that it might be a
+ unicode string too! In Python 2.3, str and unicode have a common base
+ class, basestring, so you can do:
+
+ Okay: if isinstance(obj, basestring):
+ Okay: if type(a1) is type(b1):
+ """
+ match = COMPARE_TYPE_REGEX.search(logical_line)
+ if match:
+ inst = match.group(1)
+ if inst and isidentifier(inst) and inst not in SINGLETONS:
+ return # Allow comparison for types which are not obvious
+ yield match.start(), "E721 do not compare types, use 'isinstance()'"
+
+
+def python_3000_has_key(logical_line, noqa):
+ r"""The {}.has_key() method is removed in Python 3: use the 'in' operator.
+
+ Okay: if "alph" in d:\n print d["alph"]
+ W601: assert d.has_key('alph')
+ """
+ pos = logical_line.find('.has_key(')
+ if pos > -1 and not noqa:
+ yield pos, "W601 .has_key() is deprecated, use 'in'"
+
+
+def python_3000_raise_comma(logical_line):
+ r"""When raising an exception, use "raise ValueError('message')".
+
+ The older form is removed in Python 3.
+
+ Okay: raise DummyError("Message")
+ W602: raise DummyError, "Message"
+ """
+ match = RAISE_COMMA_REGEX.match(logical_line)
+ if match and not RERAISE_COMMA_REGEX.match(logical_line):
+ yield match.end() - 1, "W602 deprecated form of raising exception"
+
+
+def python_3000_not_equal(logical_line):
+ r"""New code should always use != instead of <>.
+
+ The older syntax is removed in Python 3.
+
+ Okay: if a != 'no':
+ W603: if a <> 'no':
+ """
+ pos = logical_line.find('<>')
+ if pos > -1:
+ yield pos, "W603 '<>' is deprecated, use '!='"
+
+
+def python_3000_backticks(logical_line):
+ r"""Backticks are removed in Python 3: use repr() instead.
+
+ Okay: val = repr(1 + 2)
+ W604: val = `1 + 2`
+ """
+ pos = logical_line.find('`')
+ if pos > -1:
+ yield pos, "W604 backticks are deprecated, use 'repr()'"
+
+
+##############################################################################
+# Helper functions
+##############################################################################
+
+
+if '' == ''.encode():
+ # Python 2: implicit encoding.
+ def readlines(filename):
+ """Read the source code."""
+ with open(filename, 'rU') as f:
+ return f.readlines()
+ isidentifier = re.compile(r'[a-zA-Z_]\w*').match
+ stdin_get_value = sys.stdin.read
+else:
+ # Python 3
+ def readlines(filename):
+ """Read the source code."""
+ try:
+ with open(filename, 'rb') as f:
+ (coding, lines) = tokenize.detect_encoding(f.readline)
+ f = TextIOWrapper(f, coding, line_buffering=True)
+ return [l.decode(coding) for l in lines] + f.readlines()
+ except (LookupError, SyntaxError, UnicodeError):
+ # Fall back if file encoding is improperly declared
+ with open(filename, encoding='latin-1') as f:
+ return f.readlines()
+ isidentifier = str.isidentifier
+
+ def stdin_get_value():
+ return TextIOWrapper(sys.stdin.buffer, errors='ignore').read()
+noqa = re.compile(r'# no(?:qa|pep8)\b', re.I).search
+
+
+def expand_indent(line):
+ r"""Return the amount of indentation.
+
+ Tabs are expanded to the next multiple of 8.
+
+ >>> expand_indent(' ')
+ 4
+ >>> expand_indent('\t')
+ 8
+ >>> expand_indent(' \t')
+ 8
+ >>> expand_indent(' \t')
+ 16
+ """
+ if '\t' not in line:
+ return len(line) - len(line.lstrip())
+ result = 0
+ for char in line:
+ if char == '\t':
+ result = result // 8 * 8 + 8
+ elif char == ' ':
+ result += 1
+ else:
+ break
+ return result
+
+
+def mute_string(text):
+ """Replace contents with 'xxx' to prevent syntax matching.
+
+ >>> mute_string('"abc"')
+ '"xxx"'
+ >>> mute_string("'''abc'''")
+ "'''xxx'''"
+ >>> mute_string("r'abc'")
+ "r'xxx'"
+ """
+ # String modifiers (e.g. u or r)
+ start = text.index(text[-1]) + 1
+ end = len(text) - 1
+ # Triple quotes
+ if text[-3:] in ('"""', "'''"):
+ start += 2
+ end -= 2
+ return text[:start] + 'x' * (end - start) + text[end:]
+
+
+def parse_udiff(diff, patterns=None, parent='.'):
+ """Return a dictionary of matching lines."""
+ # For each file of the diff, the entry key is the filename,
+ # and the value is a set of row numbers to consider.
+ rv = {}
+ path = nrows = None
+ for line in diff.splitlines():
+ if nrows:
+ if line[:1] != '-':
+ nrows -= 1
+ continue
+ if line[:3] == '@@ ':
+ hunk_match = HUNK_REGEX.match(line)
+ (row, nrows) = [int(g or '1') for g in hunk_match.groups()]
+ rv[path].update(range(row, row + nrows))
+ elif line[:3] == '+++':
+ path = line[4:].split('\t', 1)[0]
+ if path[:2] == 'b/':
+ path = path[2:]
+ rv[path] = set()
+ return dict([(os.path.join(parent, path), rows)
+ for (path, rows) in rv.items()
+ if rows and filename_match(path, patterns)])
+
+
+def normalize_paths(value, parent=os.curdir):
+ """Parse a comma-separated list of paths.
+
+ Return a list of absolute paths.
+ """
+ if not value or isinstance(value, list):
+ return value
+ paths = []
+ for path in value.split(','):
+ if '/' in path:
+ path = os.path.abspath(os.path.join(parent, path))
+ paths.append(path.rstrip('/'))
+ return paths
+
+
+def filename_match(filename, patterns, default=True):
+ """Check if patterns contains a pattern that matches filename.
+
+ If patterns is unspecified, this always returns True.
+ """
+ if not patterns:
+ return default
+ return any(fnmatch(filename, pattern) for pattern in patterns)
+
+
+if COMMENT_WITH_NL:
+ def _is_eol_token(token):
+ return (token[0] in NEWLINE or
+ (token[0] == tokenize.COMMENT and token[1] == token[4]))
+else:
+ def _is_eol_token(token):
+ return token[0] in NEWLINE
+
+
+##############################################################################
+# Framework to run all checks
+##############################################################################
+
+
+_checks = {'physical_line': {}, 'logical_line': {}, 'tree': {}}
+
+
+def register_check(check, codes=None):
+ """Register a new check object."""
+ def _add_check(check, kind, codes, args):
+ if check in _checks[kind]:
+ _checks[kind][check][0].extend(codes or [])
+ else:
+ _checks[kind][check] = (codes or [''], args)
+ if inspect.isfunction(check):
+ args = inspect.getargspec(check)[0]
+ if args and args[0] in ('physical_line', 'logical_line'):
+ if codes is None:
+ codes = ERRORCODE_REGEX.findall(check.__doc__ or '')
+ _add_check(check, args[0], codes, args)
+ elif inspect.isclass(check):
+ if inspect.getargspec(check.__init__)[0][:2] == ['self', 'tree']:
+ _add_check(check, 'tree', codes, None)
+
+
+def init_checks_registry():
+ """Register all globally visible functions.
+
+ The first argument name is either 'physical_line' or 'logical_line'.
+ """
+ mod = inspect.getmodule(register_check)
+ for (name, function) in inspect.getmembers(mod, inspect.isfunction):
+ register_check(function)
+init_checks_registry()
+
+
+class Checker(object):
+ """Load a Python source file, tokenize it, check coding style."""
+
+ def __init__(self, filename=None, lines=None,
+ options=None, report=None, **kwargs):
+ if options is None:
+ options = StyleGuide(kwargs).options
+ else:
+ assert not kwargs
+ self._io_error = None
+ self._physical_checks = options.physical_checks
+ self._logical_checks = options.logical_checks
+ self._ast_checks = options.ast_checks
+ self.max_line_length = options.max_line_length
+ self.multiline = False # in a multiline string?
+ self.hang_closing = options.hang_closing
+ self.verbose = options.verbose
+ self.filename = filename
+ if filename is None:
+ self.filename = 'stdin'
+ self.lines = lines or []
+ elif filename == '-':
+ self.filename = 'stdin'
+ self.lines = stdin_get_value().splitlines(True)
+ elif lines is None:
+ try:
+ self.lines = readlines(filename)
+ except IOError:
+ (exc_type, exc) = sys.exc_info()[:2]
+ self._io_error = '%s: %s' % (exc_type.__name__, exc)
+ self.lines = []
+ else:
+ self.lines = lines
+ if self.lines:
+ ord0 = ord(self.lines[0][0])
+ if ord0 in (0xef, 0xfeff): # Strip the UTF-8 BOM
+ if ord0 == 0xfeff:
+ self.lines[0] = self.lines[0][1:]
+ elif self.lines[0][:3] == '\xef\xbb\xbf':
+ self.lines[0] = self.lines[0][3:]
+ self.report = report or options.report
+ self.report_error = self.report.error
+
+ def report_invalid_syntax(self):
+ """Check if the syntax is valid."""
+ (exc_type, exc) = sys.exc_info()[:2]
+ if len(exc.args) > 1:
+ offset = exc.args[1]
+ if len(offset) > 2:
+ offset = offset[1:3]
+ else:
+ offset = (1, 0)
+ self.report_error(offset[0], offset[1] or 0,
+ 'E901 %s: %s' % (exc_type.__name__, exc.args[0]),
+ self.report_invalid_syntax)
+
+ def readline(self):
+ """Get the next line from the input buffer."""
+ if self.line_number >= self.total_lines:
+ return ''
+ line = self.lines[self.line_number]
+ self.line_number += 1
+ if self.indent_char is None and line[:1] in WHITESPACE:
+ self.indent_char = line[0]
+ return line
+
+ def run_check(self, check, argument_names):
+ """Run a check plugin."""
+ arguments = []
+ for name in argument_names:
+ arguments.append(getattr(self, name))
+ return check(*arguments)
+
+ def check_physical(self, line):
+ """Run all physical checks on a raw input line."""
+ self.physical_line = line
+ for name, check, argument_names in self._physical_checks:
+ result = self.run_check(check, argument_names)
+ if result is not None:
+ (offset, text) = result
+ self.report_error(self.line_number, offset, text, check)
+ if text[:4] == 'E101':
+ self.indent_char = line[0]
+
+ def build_tokens_line(self):
+ """Build a logical line from tokens."""
+ logical = []
+ comments = []
+ length = 0
+ prev_row = prev_col = mapping = None
+ for token_type, text, start, end, line in self.tokens:
+ if token_type in SKIP_TOKENS:
+ continue
+ if not mapping:
+ mapping = [(0, start)]
+ if token_type == tokenize.COMMENT:
+ comments.append(text)
+ continue
+ if token_type == tokenize.STRING:
+ text = mute_string(text)
+ if prev_row:
+ (start_row, start_col) = start
+ if prev_row != start_row: # different row
+ prev_text = self.lines[prev_row - 1][prev_col - 1]
+ if prev_text == ',' or (prev_text not in '{[('
+ and text not in '}])'):
+ text = ' ' + text
+ elif prev_col != start_col: # different column
+ text = line[prev_col:start_col] + text
+ logical.append(text)
+ length += len(text)
+ mapping.append((length, end))
+ (prev_row, prev_col) = end
+ self.logical_line = ''.join(logical)
+ self.noqa = comments and noqa(''.join(comments))
+ return mapping
+
+ def check_logical(self):
+ """Build a line from tokens and run all logical checks on it."""
+ self.report.increment_logical_line()
+ mapping = self.build_tokens_line()
+ (start_row, start_col) = mapping[0][1]
+ start_line = self.lines[start_row - 1]
+ self.indent_level = expand_indent(start_line[:start_col])
+ if self.blank_before < self.blank_lines:
+ self.blank_before = self.blank_lines
+ if self.verbose >= 2:
+ print(self.logical_line[:80].rstrip())
+ for name, check, argument_names in self._logical_checks:
+ if self.verbose >= 4:
+ print(' ' + name)
+ for offset, text in self.run_check(check, argument_names) or ():
+ if not isinstance(offset, tuple):
+ for token_offset, pos in mapping:
+ if offset <= token_offset:
+ break
+ offset = (pos[0], pos[1] + offset - token_offset)
+ self.report_error(offset[0], offset[1], text, check)
+ if self.logical_line:
+ self.previous_indent_level = self.indent_level
+ self.previous_logical = self.logical_line
+ self.blank_lines = 0
+ self.tokens = []
+
+ def check_ast(self):
+ """Build the file's AST and run all AST checks."""
+ try:
+ tree = compile(''.join(self.lines), '', 'exec', PyCF_ONLY_AST)
+ except (SyntaxError, TypeError):
+ return self.report_invalid_syntax()
+ for name, cls, __ in self._ast_checks:
+ checker = cls(tree, self.filename)
+ for lineno, offset, text, check in checker.run():
+ if not self.lines or not noqa(self.lines[lineno - 1]):
+ self.report_error(lineno, offset, text, check)
+
+ def generate_tokens(self):
+ """Tokenize the file, run physical line checks and yield tokens."""
+ if self._io_error:
+ self.report_error(1, 0, 'E902 %s' % self._io_error, readlines)
+ tokengen = tokenize.generate_tokens(self.readline)
+ try:
+ for token in tokengen:
+ if token[2][0] > self.total_lines:
+ return
+ self.maybe_check_physical(token)
+ yield token
+ except (SyntaxError, tokenize.TokenError):
+ self.report_invalid_syntax()
+
+ def maybe_check_physical(self, token):
+ """If appropriate (based on token), check current physical line(s)."""
+ # Called after every token, but act only on end of line.
+ if _is_eol_token(token):
+ # Obviously, a newline token ends a single physical line.
+ self.check_physical(token[4])
+ elif token[0] == tokenize.STRING and '\n' in token[1]:
+ # Less obviously, a string that contains newlines is a
+ # multiline string, either triple-quoted or with internal
+ # newlines backslash-escaped. Check every physical line in the
+ # string *except* for the last one: its newline is outside of
+ # the multiline string, so we consider it a regular physical
+ # line, and will check it like any other physical line.
+ #
+ # Subtleties:
+ # - we don't *completely* ignore the last line; if it contains
+ # the magical "# noqa" comment, we disable all physical
+ # checks for the entire multiline string
+ # - have to wind self.line_number back because initially it
+ # points to the last line of the string, and we want
+ # check_physical() to give accurate feedback
+ if noqa(token[4]):
+ return
+ self.multiline = True
+ self.line_number = token[2][0]
+ for line in token[1].split('\n')[:-1]:
+ self.check_physical(line + '\n')
+ self.line_number += 1
+ self.multiline = False
+
+ def check_all(self, expected=None, line_offset=0):
+ """Run all checks on the input file."""
+ self.report.init_file(self.filename, self.lines, expected, line_offset)
+ self.total_lines = len(self.lines)
+ if self._ast_checks:
+ self.check_ast()
+ self.line_number = 0
+ self.indent_char = None
+ self.indent_level = self.previous_indent_level = 0
+ self.previous_logical = ''
+ self.tokens = []
+ self.blank_lines = self.blank_before = 0
+ parens = 0
+ for token in self.generate_tokens():
+ self.tokens.append(token)
+ token_type, text = token[0:2]
+ if self.verbose >= 3:
+ if token[2][0] == token[3][0]:
+ pos = '[%s:%s]' % (token[2][1] or '', token[3][1])
+ else:
+ pos = 'l.%s' % token[3][0]
+ print('l.%s\t%s\t%s\t%r' %
+ (token[2][0], pos, tokenize.tok_name[token[0]], text))
+ if token_type == tokenize.OP:
+ if text in '([{':
+ parens += 1
+ elif text in '}])':
+ parens -= 1
+ elif not parens:
+ if token_type in NEWLINE:
+ if token_type == tokenize.NEWLINE:
+ self.check_logical()
+ self.blank_before = 0
+ elif len(self.tokens) == 1:
+ # The physical line contains only this token.
+ self.blank_lines += 1
+ del self.tokens[0]
+ else:
+ self.check_logical()
+ elif COMMENT_WITH_NL and token_type == tokenize.COMMENT:
+ if len(self.tokens) == 1:
+ # The comment also ends a physical line
+ token = list(token)
+ token[1] = text.rstrip('\r\n')
+ token[3] = (token[2][0], token[2][1] + len(token[1]))
+ self.tokens = [tuple(token)]
+ self.check_logical()
+ if self.tokens:
+ self.check_physical(self.lines[-1])
+ self.check_logical()
+ return self.report.get_file_results()
+
+
+class BaseReport(object):
+ """Collect the results of the checks."""
+
+ print_filename = False
+
+ def __init__(self, options):
+ self._benchmark_keys = options.benchmark_keys
+ self._ignore_code = options.ignore_code
+ # Results
+ self.elapsed = 0
+ self.total_errors = 0
+ self.counters = dict.fromkeys(self._benchmark_keys, 0)
+ self.messages = {}
+
+ def start(self):
+ """Start the timer."""
+ self._start_time = time.time()
+
+ def stop(self):
+ """Stop the timer."""
+ self.elapsed = time.time() - self._start_time
+
+ def init_file(self, filename, lines, expected, line_offset):
+ """Signal a new file."""
+ self.filename = filename
+ self.lines = lines
+ self.expected = expected or ()
+ self.line_offset = line_offset
+ self.file_errors = 0
+ self.counters['files'] += 1
+ self.counters['physical lines'] += len(lines)
+
+ def increment_logical_line(self):
+ """Signal a new logical line."""
+ self.counters['logical lines'] += 1
+
+ def error(self, line_number, offset, text, check):
+ """Report an error, according to options."""
+ code = text[:4]
+ if self._ignore_code(code):
+ return
+ if code in self.counters:
+ self.counters[code] += 1
+ else:
+ self.counters[code] = 1
+ self.messages[code] = text[5:]
+ # Don't care about expected errors or warnings
+ if code in self.expected:
+ return
+ if self.print_filename and not self.file_errors:
+ print(self.filename)
+ self.file_errors += 1
+ self.total_errors += 1
+ return code
+
+ def get_file_results(self):
+ """Return the count of errors and warnings for this file."""
+ return self.file_errors
+
+ def get_count(self, prefix=''):
+ """Return the total count of errors and warnings."""
+ return sum([self.counters[key]
+ for key in self.messages if key.startswith(prefix)])
+
+ def get_statistics(self, prefix=''):
+ """Get statistics for message codes that start with the prefix.
+
+ prefix='' matches all errors and warnings
+ prefix='E' matches all errors
+ prefix='W' matches all warnings
+ prefix='E4' matches all errors that have to do with imports
+ """
+ return ['%-7s %s %s' % (self.counters[key], key, self.messages[key])
+ for key in sorted(self.messages) if key.startswith(prefix)]
+
+ def print_statistics(self, prefix=''):
+ """Print overall statistics (number of errors and warnings)."""
+ for line in self.get_statistics(prefix):
+ print(line)
+
+ def print_benchmark(self):
+ """Print benchmark numbers."""
+ print('%-7.2f %s' % (self.elapsed, 'seconds elapsed'))
+ if self.elapsed:
+ for key in self._benchmark_keys:
+ print('%-7d %s per second (%d total)' %
+ (self.counters[key] / self.elapsed, key,
+ self.counters[key]))
+
+
+class FileReport(BaseReport):
+ """Collect the results of the checks and print only the filenames."""
+ print_filename = True
+
+
+class StandardReport(BaseReport):
+ """Collect and print the results of the checks."""
+
+ def __init__(self, options):
+ super(StandardReport, self).__init__(options)
+ self._fmt = REPORT_FORMAT.get(options.format.lower(),
+ options.format)
+ self._repeat = options.repeat
+ self._show_source = options.show_source
+ self._show_pep8 = options.show_pep8
+
+ def init_file(self, filename, lines, expected, line_offset):
+ """Signal a new file."""
+ self._deferred_print = []
+ return super(StandardReport, self).init_file(
+ filename, lines, expected, line_offset)
+
+ def error(self, line_number, offset, text, check):
+ """Report an error, according to options."""
+ code = super(StandardReport, self).error(line_number, offset,
+ text, check)
+ if code and (self.counters[code] == 1 or self._repeat):
+ self._deferred_print.append(
+ (line_number, offset, code, text[5:], check.__doc__))
+ return code
+
+ def get_file_results(self):
+ """Print the result and return the overall count for this file."""
+ self._deferred_print.sort()
+ for line_number, offset, code, text, doc in self._deferred_print:
+ print(self._fmt % {
+ 'path': self.filename,
+ 'row': self.line_offset + line_number, 'col': offset + 1,
+ 'code': code, 'text': text,
+ })
+ if self._show_source:
+ if line_number > len(self.lines):
+ line = ''
+ else:
+ line = self.lines[line_number - 1]
+ print(line.rstrip())
+ print(re.sub(r'\S', ' ', line[:offset]) + '^')
+ if self._show_pep8 and doc:
+ print(' ' + doc.strip())
+ return self.file_errors
+
+
+class DiffReport(StandardReport):
+ """Collect and print the results for the changed lines only."""
+
+ def __init__(self, options):
+ super(DiffReport, self).__init__(options)
+ self._selected = options.selected_lines
+
+ def error(self, line_number, offset, text, check):
+ if line_number not in self._selected[self.filename]:
+ return
+ return super(DiffReport, self).error(line_number, offset, text, check)
+
+
+class StyleGuide(object):
+ """Initialize a PEP-8 instance with few options."""
+
+ def __init__(self, *args, **kwargs):
+ # build options from the command line
+ self.checker_class = kwargs.pop('checker_class', Checker)
+ parse_argv = kwargs.pop('parse_argv', False)
+ config_file = kwargs.pop('config_file', None)
+ parser = kwargs.pop('parser', None)
+ # build options from dict
+ options_dict = dict(*args, **kwargs)
+ arglist = None if parse_argv else options_dict.get('paths', None)
+ options, self.paths = process_options(
+ arglist, parse_argv, config_file, parser)
+ if options_dict:
+ options.__dict__.update(options_dict)
+ if 'paths' in options_dict:
+ self.paths = options_dict['paths']
+
+ self.runner = self.input_file
+ self.options = options
+
+ if not options.reporter:
+ options.reporter = BaseReport if options.quiet else StandardReport
+
+ options.select = tuple(options.select or ())
+ if not (options.select or options.ignore or
+ options.testsuite or options.doctest) and DEFAULT_IGNORE:
+ # The default choice: ignore controversial checks
+ options.ignore = tuple(DEFAULT_IGNORE.split(','))
+ else:
+ # Ignore all checks which are not explicitly selected
+ options.ignore = ('',) if options.select else tuple(options.ignore)
+ options.benchmark_keys = BENCHMARK_KEYS[:]
+ options.ignore_code = self.ignore_code
+ options.physical_checks = self.get_checks('physical_line')
+ options.logical_checks = self.get_checks('logical_line')
+ options.ast_checks = self.get_checks('tree')
+ self.init_report()
+
+ def init_report(self, reporter=None):
+ """Initialize the report instance."""
+ self.options.report = (reporter or self.options.reporter)(self.options)
+ return self.options.report
+
+ def check_files(self, paths=None):
+ """Run all checks on the paths."""
+ if paths is None:
+ paths = self.paths
+ report = self.options.report
+ runner = self.runner
+ report.start()
+ try:
+ for path in paths:
+ if os.path.isdir(path):
+ self.input_dir(path)
+ elif not self.excluded(path):
+ runner(path)
+ except KeyboardInterrupt:
+ print('... stopped')
+ report.stop()
+ return report
+
+ def input_file(self, filename, lines=None, expected=None, line_offset=0):
+ """Run all checks on a Python source file."""
+ if self.options.verbose:
+ print('checking %s' % filename)
+ fchecker = self.checker_class(
+ filename, lines=lines, options=self.options)
+ return fchecker.check_all(expected=expected, line_offset=line_offset)
+
+ def input_dir(self, dirname):
+ """Check all files in this directory and all subdirectories."""
+ dirname = dirname.rstrip('/')
+ if self.excluded(dirname):
+ return 0
+ counters = self.options.report.counters
+ verbose = self.options.verbose
+ filepatterns = self.options.filename
+ runner = self.runner
+ for root, dirs, files in os.walk(dirname):
+ if verbose:
+ print('directory ' + root)
+ counters['directories'] += 1
+ for subdir in sorted(dirs):
+ if self.excluded(subdir, root):
+ dirs.remove(subdir)
+ for filename in sorted(files):
+ # contain a pattern that matches?
+ if ((filename_match(filename, filepatterns) and
+ not self.excluded(filename, root))):
+ runner(os.path.join(root, filename))
+
+ def excluded(self, filename, parent=None):
+ """Check if the file should be excluded.
+
+ Check if 'options.exclude' contains a pattern that matches filename.
+ """
+ if not self.options.exclude:
+ return False
+ basename = os.path.basename(filename)
+ if filename_match(basename, self.options.exclude):
+ return True
+ if parent:
+ filename = os.path.join(parent, filename)
+ filename = os.path.abspath(filename)
+ return filename_match(filename, self.options.exclude)
+
+ def ignore_code(self, code):
+ """Check if the error code should be ignored.
+
+ If 'options.select' contains a prefix of the error code,
+ return False. Else, if 'options.ignore' contains a prefix of
+ the error code, return True.
+ """
+ if len(code) < 4 and any(s.startswith(code)
+ for s in self.options.select):
+ return False
+ return (code.startswith(self.options.ignore) and
+ not code.startswith(self.options.select))
+
+ def get_checks(self, argument_name):
+ """Get all the checks for this category.
+
+ Find all globally visible functions where the first argument name
+ starts with argument_name and which contain selected tests.
+ """
+ checks = []
+ for check, attrs in _checks[argument_name].items():
+ (codes, args) = attrs
+ if any(not (code and self.ignore_code(code)) for code in codes):
+ checks.append((check.__name__, check, args))
+ return sorted(checks)
+
+
+def get_parser(prog='pep8', version=__version__):
+ parser = OptionParser(prog=prog, version=version,
+ usage="%prog [options] input ...")
+ parser.config_options = [
+ 'exclude', 'filename', 'select', 'ignore', 'max-line-length',
+ 'hang-closing', 'count', 'format', 'quiet', 'show-pep8',
+ 'show-source', 'statistics', 'verbose']
+ parser.add_option('-v', '--verbose', default=0, action='count',
+ help="print status messages, or debug with -vv")
+ parser.add_option('-q', '--quiet', default=0, action='count',
+ help="report only file names, or nothing with -qq")
+ parser.add_option('-r', '--repeat', default=True, action='store_true',
+ help="(obsolete) show all occurrences of the same error")
+ parser.add_option('--first', action='store_false', dest='repeat',
+ help="show first occurrence of each error")
+ parser.add_option('--exclude', metavar='patterns', default=DEFAULT_EXCLUDE,
+ help="exclude files or directories which match these "
+ "comma separated patterns (default: %default)")
+ parser.add_option('--filename', metavar='patterns', default='*.py',
+ help="when parsing directories, only check filenames "
+ "matching these comma separated patterns "
+ "(default: %default)")
+ parser.add_option('--select', metavar='errors', default='',
+ help="select errors and warnings (e.g. E,W6)")
+ parser.add_option('--ignore', metavar='errors', default='',
+ help="skip errors and warnings (e.g. E4,W)")
+ parser.add_option('--show-source', action='store_true',
+ help="show source code for each error")
+ parser.add_option('--show-pep8', action='store_true',
+ help="show text of PEP 8 for each error "
+ "(implies --first)")
+ parser.add_option('--statistics', action='store_true',
+ help="count errors and warnings")
+ parser.add_option('--count', action='store_true',
+ help="print total number of errors and warnings "
+ "to standard error and set exit code to 1 if "
+ "total is not null")
+ parser.add_option('--max-line-length', type='int', metavar='n',
+ default=MAX_LINE_LENGTH,
+ help="set maximum allowed line length "
+ "(default: %default)")
+ parser.add_option('--hang-closing', action='store_true',
+ help="hang closing bracket instead of matching "
+ "indentation of opening bracket's line")
+ parser.add_option('--format', metavar='format', default='default',
+ help="set the error format [default|pylint|<custom>]")
+ parser.add_option('--diff', action='store_true',
+ help="report only lines changed according to the "
+ "unified diff received on STDIN")
+ group = parser.add_option_group("Testing Options")
+ if os.path.exists(TESTSUITE_PATH):
+ group.add_option('--testsuite', metavar='dir',
+ help="run regression tests from dir")
+ group.add_option('--doctest', action='store_true',
+ help="run doctest on myself")
+ group.add_option('--benchmark', action='store_true',
+ help="measure processing speed")
+ return parser
+
+
+def read_config(options, args, arglist, parser):
+ """Read both user configuration and local configuration."""
+ config = RawConfigParser()
+
+ user_conf = options.config
+ if user_conf and os.path.isfile(user_conf):
+ if options.verbose:
+ print('user configuration: %s' % user_conf)
+ config.read(user_conf)
+
+ local_dir = os.curdir
+ parent = tail = args and os.path.abspath(os.path.commonprefix(args))
+ while tail:
+ if config.read([os.path.join(parent, fn) for fn in PROJECT_CONFIG]):
+ local_dir = parent
+ if options.verbose:
+ print('local configuration: in %s' % parent)
+ break
+ (parent, tail) = os.path.split(parent)
+
+ pep8_section = parser.prog
+ if config.has_section(pep8_section):
+ option_list = dict([(o.dest, o.type or o.action)
+ for o in parser.option_list])
+
+ # First, read the default values
+ (new_options, __) = parser.parse_args([])
+
+ # Second, parse the configuration
+ for opt in config.options(pep8_section):
+ if opt.replace('_', '-') not in parser.config_options:
+ print(" unknown option '%s' ignored" % opt)
+ continue
+ if options.verbose > 1:
+ print(" %s = %s" % (opt, config.get(pep8_section, opt)))
+ normalized_opt = opt.replace('-', '_')
+ opt_type = option_list[normalized_opt]
+ if opt_type in ('int', 'count'):
+ value = config.getint(pep8_section, opt)
+ elif opt_type == 'string':
+ value = config.get(pep8_section, opt)
+ if normalized_opt == 'exclude':
+ value = normalize_paths(value, local_dir)
+ else:
+ assert opt_type in ('store_true', 'store_false')
+ value = config.getboolean(pep8_section, opt)
+ setattr(new_options, normalized_opt, value)
+
+ # Third, overwrite with the command-line options
+ (options, __) = parser.parse_args(arglist, values=new_options)
+ options.doctest = options.testsuite = False
+ return options
+
+
+def process_options(arglist=None, parse_argv=False, config_file=None,
+ parser=None):
+ """Process options passed either via arglist or via command line args."""
+ if not parser:
+ parser = get_parser()
+ if not parser.has_option('--config'):
+ if config_file is True:
+ config_file = DEFAULT_CONFIG
+ group = parser.add_option_group("Configuration", description=(
+ "The project options are read from the [%s] section of the "
+ "tox.ini file or the setup.cfg file located in any parent folder "
+ "of the path(s) being processed. Allowed options are: %s." %
+ (parser.prog, ', '.join(parser.config_options))))
+ group.add_option('--config', metavar='path', default=config_file,
+ help="user config file location (default: %default)")
+ # Don't read the command line if the module is used as a library.
+ if not arglist and not parse_argv:
+ arglist = []
+ # If parse_argv is True and arglist is None, arguments are
+ # parsed from the command line (sys.argv)
+ (options, args) = parser.parse_args(arglist)
+ options.reporter = None
+
+ if options.ensure_value('testsuite', False):
+ args.append(options.testsuite)
+ elif not options.ensure_value('doctest', False):
+ if parse_argv and not args:
+ if options.diff or any(os.path.exists(name)
+ for name in PROJECT_CONFIG):
+ args = ['.']
+ else:
+ parser.error('input not specified')
+ options = read_config(options, args, arglist, parser)
+ options.reporter = parse_argv and options.quiet == 1 and FileReport
+
+ options.filename = options.filename and options.filename.split(',')
+ options.exclude = normalize_paths(options.exclude)
+ options.select = options.select and options.select.split(',')
+ options.ignore = options.ignore and options.ignore.split(',')
+
+ if options.diff:
+ options.reporter = DiffReport
+ stdin = stdin_get_value()
+ options.selected_lines = parse_udiff(stdin, options.filename, args[0])
+ args = sorted(options.selected_lines)
+
+ return options, args
+
+
+def _main():
+ """Parse options and run checks on Python source."""
+ import signal
+
+ # Handle "Broken pipe" gracefully
+ try:
+ signal.signal(signal.SIGPIPE, lambda signum, frame: sys.exit(1))
+ except AttributeError:
+ pass # not supported on Windows
+
+ pep8style = StyleGuide(parse_argv=True, config_file=True)
+ options = pep8style.options
+ if options.doctest or options.testsuite:
+ from testsuite.support import run_tests
+ report = run_tests(pep8style)
+ else:
+ report = pep8style.check_files()
+ if options.statistics:
+ report.print_statistics()
+ if options.benchmark:
+ report.print_benchmark()
+ if options.testsuite and not options.quiet:
+ report.print_results()
+ if report.total_errors:
+ if options.count:
+ sys.stderr.write(str(report.total_errors) + '\n')
+ sys.exit(1)
+
+if __name__ == '__main__':
+ _main()
--
2.1.3
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