def sim_ratcliff_obershelp(src, tar):
return RatcliffObershelp().sim(src, tar)<EOL>
Return the Ratcliff-Obershelp similarity of two strings.

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

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

    Returns
    -------
    float
        Ratcliff-Obershelp similarity

    Examples
    --------
    >>> round(sim_ratcliff_obershelp('cat', 'hat'), 12)
    0.666666666667
    >>> round(sim_ratcliff_obershelp('Niall', 'Neil'), 12)
    0.666666666667
    >>> round(sim_ratcliff_obershelp('aluminum', 'Catalan'), 12)
    0.4
    >>> sim_ratcliff_obershelp('ATCG', 'TAGC')
    0.5