def dist_overlap(src, tar, qval=<NUM_LIT:2>):
return Overlap().dist(src, tar, qval)<EOL>
Return the overlap distance between two strings.

    This is a wrapper for :py:meth:`Overlap.dist`.

    Parameters
    ----------
    src : str
        Source string (or QGrams/Counter objects) for comparison
    tar : str
        Target string (or QGrams/Counter objects) for comparison
    qval : int
        The length of each q-gram; 0 for non-q-gram version

    Returns
    -------
    float
        Overlap distance

    Examples
    --------
    >>> dist_overlap('cat', 'hat')
    0.5
    >>> dist_overlap('Niall', 'Neil')
    0.6
    >>> dist_overlap('aluminum', 'Catalan')
    0.875
    >>> dist_overlap('ATCG', 'TAGC')
    1.0