19 lines
426 B
Python
19 lines
426 B
Python
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def is_iterable(thing):
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try:
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iter(thing)
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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 flatten(iterable):
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"""Flatten a list of lists."""
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flattened = []
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for item in iterable:
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if is_iterable(item) and not isinstance(item, (str, bytes)):
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flattened += flatten(item)
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elif item is not None:
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flattened.append(item)
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return flattened
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