def removeall(item, seq):
    """Return a copy of seq (or string) with all occurences of item removed.
    >>> removeall(3, [1, 2, 3, 3, 2, 1, 3])
    [1, 2, 2, 1]
    >>> removeall(4, [1, 2, 3])
    [1, 2, 3]
    """
    if isinstance(seq, str):
        return seq.replace(item, '')
    else:
        return [x for x in seq if x != item]
def removeall(item, seq):
    """Return a copy of seq (or string) with all occurences of item removed.
    >>> removeall(3, [1, 2, 3, 3, 2, 1, 3])
    [1, 2, 2, 1]
    >>> removeall(4, [1, 2, 3])
    [1, 2, 3]
    """
    if isinstance(seq, str):
        return seq.replace(item, '')
    else:
        return [x for x in seq if x != item]
Return a copy of seq (or string) with all occurences of item removed.
    >>> removeall(3, [1, 2, 3, 3, 2, 1, 3])
    [1, 2, 2, 1]
    >>> removeall(4, [1, 2, 3])
    [1, 2, 3]