37 lines
1.1 KiB
Python
37 lines
1.1 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 collections
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import itertools
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import sys
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import warnings
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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 is_iterator(x):
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"""An implementation independent way of checking for iterators
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Python 2.6 has a different implementation of collections.Iterator which
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accepts anything with a `next` method. 2.7+ requires and `__iter__` method
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as well.
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"""
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if sys.version_info >= (2, 7):
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return isinstance(x, collections.Iterator)
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return isinstance(x, collections.Iterator) and hasattr(x, '__iter__')
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def product(*args, **kwds):
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warnings.warn("django.utils.itercompat.product is deprecated; use the native version instead",
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DeprecationWarning, stacklevel=2)
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return itertools.product(*args, **kwds)
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