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# pylint: disable=E0601,W0622,W0611
# copyright 2003-2011 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of logilab-common.
#
# logilab-common is free software: you can redistribute it and/or modify it under
# the terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option) any
# later version.
#
# logilab-common 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 Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with logilab-common. If not, see <http://www.gnu.org/licenses/>.
"""Wrappers around some builtins introduced in python 2.3, 2.4 and
2.5, making them available in for earlier versions of python.
See another compatibility snippets from other projects:
:mod:`lib2to3.fixes`
:mod:`coverage.backward`
:mod:`unittest2.compatibility`
"""
__docformat__ = "restructuredtext en"
import sys
import types
from typing import Union
# not used here, but imported to preserve API
import builtins # noqa
def str_to_bytes(string):
return str.encode(string)
# we have to ignore the encoding in py3k to be able to write a string into a
# TextIOWrapper or like object (which expect an unicode string)
def str_encode(string: Union[int, str], encoding: str) -> str:
return str(string)
# See also http://bugs.python.org/issue11776
if sys.version_info[0] == 3:
def method_type(callable, instance, klass):
# api change. klass is no more considered
return types.MethodType(callable, instance)
else:
# alias types otherwise
method_type = types.MethodType
# Pythons 2 and 3 differ on where to get StringIO
if sys.version_info < (3, 0):
from cStringIO import StringIO
FileIO = file # noqa
BytesIO = StringIO
reload = reload # noqa
else:
from io import StringIO, FileIO # noqa
from imp import reload # noqa
from logilab.common.deprecation import deprecated # noqa
# Other projects import these from here, keep providing them for
# backwards compat
any = deprecated('use builtin "any"')(any)
all = deprecated('use builtin "all"')(all)
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