numpy.core.defchararray.index

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

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.

参见

find, str.find