This is documentation for an old release of NumPy (version 1.15). Read this page Search for this page in the documentation of the latest stable release (version 2.2).

numpy.core.defchararray.index

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

Like find, but raises ValueError when the substring is not found.

Calls str.index 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. Returns -1 if sub is not found.

See also

find, str.find