numpy.core.defchararray.index — NumPy v1.15 Manual (original) (raw)

numpy.core.defchararray. index(a, sub, start=0, end=None)[source]¶

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.