numpy.core.defchararray.find

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

For each element, return the lowest index in the string where substring sub is found.

Calls str.find element-wise.

For each element, return the lowest index in the string where substring sub is found, such that sub is contained in the range [start, end].

Parameters:
a : array_like of str or unicode
sub : str or unicode
start, end : int, optional

Optional arguments start and end are interpreted as in slice notation.

Returns:
out : ndarray or int

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

参见

str.find