numpy.char.index

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

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

Calls str.index element-wise.

Parameters:

aarray_like of str or unicode

substr or unicode

start, endint, optional

Returns:

outndarray

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

See also

find, str.find

Examples

>>> a = np.array(["Computer Science"])
>>> np.char.index(a, "Science", start=0, end=None)
array([9])