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