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# numpy.core.defchararray.rindex

`numpy.core.defchararray.``rindex`(a, sub, start=0, end=None)

  Like `rfind`, but raises ValueError when the substring sub is not found.

  Calls str.rindex element-wise.

  Parameters : | a : array-like of str or unicode sub : str or unicode start, end : int, optional
  Returns : | out : ndarray Output array of ints.

  See also

  `rfind`, `str.rindex`