22 lines
539 B
Python
22 lines
539 B
Python
"""
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>>> items = [1, 2, [3, 4, [5, 6], 7], 8]
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>>> flatten(items)
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<generator object flatten at 0x73bd9c>
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>>> list(flatten(items))
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[1, 2, 3, 4, 5, 6, 7, 8]
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>>> mixed_bag = [1, 'spam', 2, [3, 'eggs', 4], {'x': 1, 'y': 2}]
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>>> list(flatten(mixed_bag))
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[1, 'spam', 2, 3, 'eggs', 4, 'y', 'x']
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"""
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from collections import Iterable
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def flatten(items):
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for x in items:
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if isinstance(x, Iterable) and not isinstance(x, (str, bytes)):
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yield from flatten(x)
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else:
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yield x
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