Mix of Python and Django utility functions, classed etc.
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def firstof(*args, default=None):
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"""
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Returns the first value which is neither empty nor None.
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"""
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if len(args) == 1:
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iterable = args[0]
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else:
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iterable = args
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for value in iterable:
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if value:
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return value
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return default
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def join_existing(delimiter, *items):
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return delimiter.join([str(i) for i in items if i])
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