def dist_indel(src, tar):
return Indel().dist(src, tar)<EOL>
Return the normalized indel distance between two strings.

    This is equivalent to normalized Levenshtein distance, when only inserts
    and deletes are possible.

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

    Returns
    -------
    float
        Normalized indel distance

    Examples
    --------
    >>> round(dist_indel('cat', 'hat'), 12)
    0.333333333333
    >>> round(dist_indel('Niall', 'Neil'), 12)
    0.333333333333
    >>> round(dist_indel('Colin', 'Cuilen'), 12)
    0.454545454545
    >>> dist_indel('ATCG', 'TAGC')
    0.5