forked from beba/foerderbarometer
25 lines
633 B
Python
25 lines
633 B
Python
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from typing import Iterable
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def reorder_value(values: Iterable, value, *, after=None, before=None):
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"""
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Reorders a value after or before another value in the given list.
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Does not work properly for duplicate or None values.
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Raises ValueError when any of the values is not contained in the list.
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"""
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assert (after is None) != (before is None), 'Either after or before is needed but not both.'
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values = list(values)
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values.remove(value)
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if after is None:
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index = values.index(before)
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else:
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index = values.index(after) + 1
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values.insert(index, value)
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return values
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