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 |
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https://docs.scipy.org/doc/numpy-1.10.1/reference/generated/numpy.core.defchararray.index.html