Revert "pylint: upgrade to 1.3.1"

third_party/pylint/checkers/stdlib.py

-# Copyright 2012 Google Inc.
-#
-# http://www.logilab.fr/ -- mailto:contact@logilab.fr
-# This program is free software; you can redistribute it and/or modify it under
-# the terms of the GNU General Public License as published by the Free Software
-# Foundation; either version 2 of the License, or (at your option) any later
-# version.
-#
-# This program is distributed in the hope that it will be useful, but WITHOUT
-# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
-# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details
-#
-# You should have received a copy of the GNU General Public License along with
-# this program; if not, write to the Free Software Foundation, Inc.,
-# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
-"""Checkers for various standard library functions."""
-
-import re
-import sys
-
-import astroid
-
-from pylint.interfaces import IAstroidChecker
-from pylint.checkers import BaseChecker
-from pylint.checkers import utils
-
-_VALID_OPEN_MODE_REGEX = re.compile(r'^(r?U|[rwa]\+?b?)$')
-
-if sys.version_info >= (3, 0):
-    OPEN_MODULE = '_io'
-else:
-    OPEN_MODULE = '__builtin__'
-
-class OpenModeChecker(BaseChecker):
-    __implements__ = (IAstroidChecker,)
-    name = 'open_mode'
-
-    msgs = {
-        'W1501': ('"%s" is not a valid mode for open.',
-                  'bad-open-mode',
-                  'Python supports: r, w, a modes with b, +, and U options. '
-                  'See http://docs.python.org/2/library/functions.html#open'),
-        }
-
-    @utils.check_messages('bad-open-mode')
-    def visit_callfunc(self, node):
-        """Visit a CallFunc node."""
-        if hasattr(node, 'func'):
-            infer = utils.safe_infer(node.func)
-            if infer and infer.root().name == OPEN_MODULE:
-                if getattr(node.func, 'name', None) in ('open', 'file'):
-                    self._check_open_mode(node)
-
-    def _check_open_mode(self, node):
-        """Check that the mode argument of an open or file call is valid."""
-        try:
-            mode_arg = utils.get_argument_from_call(node, position=1, keyword='mode')
-            if mode_arg:
-                mode_arg = utils.safe_infer(mode_arg)
-                if (isinstance(mode_arg, astroid.Const)
-                        and not _VALID_OPEN_MODE_REGEX.match(mode_arg.value)):
-                    self.add_message('bad-open-mode', node=node,
-                                     args=(mode_arg.value))
-        except (utils.NoSuchArgumentError, TypeError):
-            pass
-
-def register(linter):
-    """required method to auto register this checker """
-    linter.register_checker(OpenModeChecker(linter))
-