# numpy.char.find

char.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`

  Examples

      >>> a = np.array(["NumPy is a Python library"])
      >>> np.char.find(a, "Python", start=0, end=None)
      array([11])