from typing import Iterable


def reorder_value(values: Iterable, value, *, after=None, before=None):
    """
    Reorders a value after or before another value in the given list.
    Does not work properly for duplicate or None values.
    Raises ValueError when any of the values is not contained in the list.
    """

    assert (after is None) != (before is None), 'Either after or before is needed but not both.'

    values = list(values)

    values.remove(value)

    if after is None:
        index = values.index(before)
    else:
        index = values.index(after) + 1

    values.insert(index, value)

    return values