def dup_copy(f):
    """
    Create a new copy of a polynomial ``f`` in ``K[x]``.

    Examples
    ========

    >>> from sympy.polys.domains import ZZ
    >>> from sympy.polys.densebasic import dup_copy

    >>> f = ZZ.map([1, 2, 3, 0])

    >>> dup_copy([1, 2, 3, 0])
    [1, 2, 3, 0]

    """
    return list(f)