Package logilab :: Package common :: Module compat

[frames] | no frames]

# Source Code for Module logilab.common.compat

     1  # pylint: disable=E0601,W0622,W0611
     2  # copyright 2003-2011 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
     3  # contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
     4  #
     5  # This file is part of logilab-common.
     6  #
     7  # logilab-common is free software: you can redistribute it and/or modify it under
     8  # the terms of the GNU Lesser General Public License as published by the Free
     9  # Software Foundation, either version 2.1 of the License, or (at your option) any
    10  # later version.
    11  #
    12  # logilab-common is distributed in the hope that it will be useful, but WITHOUT
    13  # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
    14  # FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
    15  # details.
    16  #
    17  # You should have received a copy of the GNU Lesser General Public License along
    18  # with logilab-common.  If not, see <http://www.gnu.org/licenses/>.
    19  """Wrappers around some builtins introduced in python 2.3, 2.4 and
    20  2.5, making them available in for earlier versions of python.
    21
    22  See another compatibility snippets from other projects:
    23
    24      :mod:`lib2to3.fixes`
    25      :mod:`coverage.backward`
    26      :mod:`unittest2.compatibility`
    27  """
    28
    29
    30  __docformat__ = "restructuredtext en"
    31
    32  import os
    33  import sys
    34  import types
    35  from warnings import warn
    36
    37  # not used here, but imported to preserve API
    38  from six.moves import builtins
    39
    40  if sys.version_info < (3, 0):
    41      str_to_bytes = str
    42 -    def str_encode(string, encoding):
    43          if isinstance(string, unicode):
    44              return string.encode(encoding)
    45          return str(string)
    46  else:
    47 -    def str_to_bytes(string):
    48          return str.encode(string)
    49      # we have to ignore the encoding in py3k to be able to write a string into a
    50      # TextIOWrapper or like object (which expect an unicode string)
    51 -    def str_encode(string, encoding):
    52          return str(string)
    53
    54  # See also http://bugs.python.org/issue11776
    55  if sys.version_info[0] == 3:
    56 -    def method_type(callable, instance, klass):
    57          # api change. klass is no more considered
    58          return types.MethodType(callable, instance)
    59  else:
    60      # alias types otherwise
    61      method_type = types.MethodType
    62
    63  # Pythons 2 and 3 differ on where to get StringIO
    64  if sys.version_info < (3, 0):
    65      from cStringIO import StringIO
    66      FileIO = file
    67      BytesIO = StringIO
    68      reload = reload
    69  else:
    70      from io import FileIO, BytesIO, StringIO
    71      from imp import reload
    72
    73  from logilab.common.deprecation import deprecated
    74
    75  # Other projects import these from here, keep providing them for
    76  # backwards compat
    77  any = deprecated('use builtin "any"')(any)
    78  all = deprecated('use builtin "all"')(all)
    79