46 lines
1.3 KiB
Python
46 lines
1.3 KiB
Python
"""
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Providing iterator functions that are not in all version of Python we support.
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Where possible, we try to use the system-native version and only fall back to
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these implementations if necessary.
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"""
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import __builtin__
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import itertools
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import warnings
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# Fallback for Python 2.5
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def product(*args, **kwds):
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"""
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Taken from http://docs.python.org/library/itertools.html#itertools.product
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"""
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# product('ABCD', 'xy') --> Ax Ay Bx By Cx Cy Dx Dy
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# product(range(2), repeat=3) --> 000 001 010 011 100 101 110 111
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pools = map(tuple, args) * kwds.get('repeat', 1)
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result = [[]]
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for pool in pools:
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result = [x+[y] for x in result for y in pool]
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for prod in result:
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yield tuple(prod)
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if hasattr(itertools, 'product'):
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product = itertools.product
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def is_iterable(x):
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"A implementation independent way of checking for iterables"
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try:
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iter(x)
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except TypeError:
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return False
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else:
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return True
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def all(iterable):
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warnings.warn("django.utils.itercompat.all is deprecated; use the native version instead",
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PendingDeprecationWarning)
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return __builtin__.all(iterable)
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def any(iterable):
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warnings.warn("django.utils.itercompat.any is deprecated; use the native version instead",
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PendingDeprecationWarning)
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return __builtin__.any(iterable)
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