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# numpy.core.defchararray.find

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

  For each element, return the lowest index in the string where substring sub is found.

  Calls str.find element-wise.

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

  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 or int Output array of ints. Returns -1 if sub is not found.

  See also

  `str.find`