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94 lines
2.9 KiB
Python
94 lines
2.9 KiB
Python
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"""
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future: Easy, safe support for Python 2/3 compatibility
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=======================================================
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``future`` is the missing compatibility layer between Python 2 and Python
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3. It allows you to use a single, clean Python 3.x-compatible codebase to
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support both Python 2 and Python 3 with minimal overhead.
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It is designed to be used as follows::
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from __future__ import (absolute_import, division,
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print_function, unicode_literals)
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from builtins import (
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bytes, dict, int, list, object, range, str,
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ascii, chr, hex, input, next, oct, open,
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pow, round, super,
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filter, map, zip)
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followed by predominantly standard, idiomatic Python 3 code that then runs
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similarly on Python 2.6/2.7 and Python 3.3+.
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The imports have no effect on Python 3. On Python 2, they shadow the
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corresponding builtins, which normally have different semantics on Python 3
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versus 2, to provide their Python 3 semantics.
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Standard library reorganization
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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``future`` supports the standard library reorganization (PEP 3108) through the
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following Py3 interfaces:
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>>> # Top-level packages with Py3 names provided on Py2:
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>>> import html.parser
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>>> import queue
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>>> import tkinter.dialog
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>>> import xmlrpc.client
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>>> # etc.
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>>> # Aliases provided for extensions to existing Py2 module names:
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>>> from future.standard_library import install_aliases
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>>> install_aliases()
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>>> from collections import Counter, OrderedDict # backported to Py2.6
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>>> from collections import UserDict, UserList, UserString
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>>> import urllib.request
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>>> from itertools import filterfalse, zip_longest
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>>> from subprocess import getoutput, getstatusoutput
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Automatic conversion
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--------------------
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An included script called `futurize
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<http://python-future.org/automatic_conversion.html>`_ aids in converting
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code (from either Python 2 or Python 3) to code compatible with both
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platforms. It is similar to ``python-modernize`` but goes further in
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providing Python 3 compatibility through the use of the backported types
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and builtin functions in ``future``.
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Documentation
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-------------
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See: http://python-future.org
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Credits
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-------
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:Author: Ed Schofield
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:Sponsor: Python Charmers Pty Ltd, Australia, and Python Charmers Pte
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Ltd, Singapore. http://pythoncharmers.com
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:Others: See docs/credits.rst or http://python-future.org/credits.html
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Licensing
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---------
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Copyright 2013-2018 Python Charmers Pty Ltd, Australia.
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The software is distributed under an MIT licence. See LICENSE.txt.
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"""
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__title__ = 'future'
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__author__ = 'Ed Schofield'
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__license__ = 'MIT'
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__copyright__ = 'Copyright 2013-2018 Python Charmers Pty Ltd'
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__ver_major__ = 0
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__ver_minor__ = 17
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__ver_patch__ = 0
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__ver_sub__ = ''
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__version__ = "%d.%d.%d%s" % (__ver_major__, __ver_minor__,
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__ver_patch__, __ver_sub__)
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