def dist_lcsstr(src, tar):
return LCSstr().dist(src, tar)<EOL>
Return the longest common substring distance between two strings.

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

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

    Returns
    -------
    float
        LCSstr distance

    Examples
    --------
    >>> dist_lcsstr('cat', 'hat')
    0.33333333333333337
    >>> dist_lcsstr('Niall', 'Neil')
    0.8
    >>> dist_lcsstr('aluminum', 'Catalan')
    0.75
    >>> dist_lcsstr('ATCG', 'TAGC')
    0.75