# numpy.char.rfind

char.rfind(a, sub, start=0, end=None)

  For each element in a, return the highest index in the string where substring sub is found, such that sub is contained within [start, end].

  Calls str.rfind element-wise.

  Parameters:
    a array-like of str or unicode
    sub str or unicode
    start, end int, optional

      Optional arguments start and end are interpreted as in slice notation.

  Returns:
    out ndarray

      Output array of ints. Return -1 on failure.

  See also

  `str.rfind`