rfind(a, sub, start=0, end=None)¶
For each element in a, return the highest index in the string where substring sub is found, such that sub is contained within [start, end].
Calls str.rfind element-wise.
- 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.
- out : ndarray
Output array of ints. Return -1 on failure.