def sim_bag(src, tar):
return Bag().sim(src, tar)<EOL>
Return the normalized bag similarity of two strings.

    This is a wrapper for :py:meth:`Bag.sim`.

    Parameters
    ----------
    src : str
        Source string for comparison
    tar : str
        Target string for comparison

    Returns
    -------
    float
        Normalized bag similarity

    Examples
    --------
    >>> round(sim_bag('cat', 'hat'), 12)
    0.666666666667
    >>> sim_bag('Niall', 'Neil')
    0.6
    >>> sim_bag('aluminum', 'Catalan')
    0.375
    >>> sim_bag('ATCG', 'TAGC')
    1.0