numpy string operations | rfind() function (original) (raw)

Last Updated : 23 Jan, 2019

numpy.core.defchararray.find(arr, sub, start=0, end=None) is another function for doing string operations in numpy.It returns the highest index in the string where substring sub is found for each element in arr.It returns -1 if sub is not contained within [start, end].

Parameters: arr : array_like of str or unicode.sub : [str or unicode] The substring which to be searched.start : [ int, optional] The starting location in each string.end : [ int, optional] The ending location in each string.Returns : [ndarray] Output array of ints.

Code #1 :

Python3 `

Python program explaining

numpy.char.rfind() method

importing numpy as geek

import numpy as geek

input arrays

in_arr = geek.array(['aAaAaA', 'baA', 'abBABba']) print ("Input array : ", in_arr)

output arrays

out_arr = geek.char.rfind(in_arr, sub ='A') print ("Output array: ", out_arr)

Output:

Input array : ['aAaAaA' 'baA' 'abBABba'] Output array: [5 2 3]

Code #2 :