23 lines
335 B
Python
23 lines
335 B
Python
from collections import Iterable
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__all__ = ["flatten", "union"]
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def flatten(i):
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for e in i:
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if isinstance(e, Iterable):
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yield from flatten(e)
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else:
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yield e
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def union(i):
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r = None
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for e in i:
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if r is None:
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r = e
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else:
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r |= e
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return r
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