/usr/lib/python3/dist-packages/bpython/_py3compat.py is in bpython3 0.15-2.
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# The MIT License
#
# Copyright (c) 2012 the bpython authors.
# Copyright (c) 2015 Sebastian Ramacher
#
# 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.
"""
Helper module for Python 3 compatibility.
Defines the following attributes:
- PythonLexer: Pygment's Python lexer matching the hosting runtime's
Python version.
- py3: True if the hosting Python runtime is of Python version 3 or later
"""
import sys
py3 = (sys.version_info[0] == 3)
if py3:
from pygments.lexers import Python3Lexer as PythonLexer
else:
from pygments.lexers import PythonLexer
if py3 or sys.version_info[:3] >= (2, 7, 3):
def prepare_for_exec(arg, encoding=None):
return arg
else:
def prepare_for_exec(arg, encoding=None):
return arg.encode(encoding)
if py3:
def try_decode(s, encoding):
return s
else:
def try_decode(s, encoding):
"""Try to decode s which is str names. Return None if not decodable"""
if not isinstance(s, unicode):
try:
return s.decode(encoding)
except UnicodeDecodeError:
return None
return s
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