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https://github.com/Sneed-Group/Poodletooth-iLand
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85 lines
2.7 KiB
Python
85 lines
2.7 KiB
Python
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# -*- coding: utf-8 -*-
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#
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# Util/py21compat.py : Compatibility code for Python 2.1
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#
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# Written in 2008 by Dwayne C. Litzenberger <dlitz@dlitz.net>
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#
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# ===================================================================
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# The contents of this file are dedicated to the public domain. To
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# the extent that dedication to the public domain is not available,
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# everyone is granted a worldwide, perpetual, royalty-free,
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# non-exclusive license to exercise all rights associated with the
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# contents of this file for any purpose whatsoever.
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# No rights are reserved.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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# ===================================================================
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"""Compatibility code for Python 2.1
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Currently, this just defines:
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- True and False
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- object
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- isinstance
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"""
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__revision__ = "$Id$"
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__all__ = []
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import sys
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import __builtin__
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# 'True' and 'False' aren't defined in Python 2.1. Define them.
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try:
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True, False
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except NameError:
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(True, False) = (1, 0)
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__all__ += ['True', 'False']
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# New-style classes were introduced in Python 2.2. Defining "object" in Python
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# 2.1 lets us use new-style classes in versions of Python that support them,
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# while still maintaining backward compatibility with old-style classes
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try:
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object
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except NameError:
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class object: pass
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__all__ += ['object']
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# Starting with Python 2.2, isinstance allows a tuple for the second argument.
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# Also, builtins like "tuple", "list", "str", "unicode", "int", and "long"
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# became first-class types, rather than functions. We want to support
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# constructs like:
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# isinstance(x, (int, long))
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# So we hack it for Python 2.1.
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try:
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isinstance(5, (int, long))
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except TypeError:
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__all__ += ['isinstance']
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_builtin_type_map = {
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tuple: type(()),
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list: type([]),
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str: type(""),
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unicode: type(u""),
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int: type(0),
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long: type(0L),
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}
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def isinstance(obj, t):
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if not __builtin__.isinstance(t, type(())):
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# t is not a tuple
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return __builtin__.isinstance(obj, _builtin_type_map.get(t, t))
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else:
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# t is a tuple
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for typ in t:
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if __builtin__.isinstance(obj, _builtin_type_map.get(typ, typ)):
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return True
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return False
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# vim:set ts=4 sw=4 sts=4 expandtab:
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