Numpy string operations | rindex() function

Last Updated : 29 Aug, 2020

numpy.core.defchararray.rindex() function, raises ValueError when the substring sub is not found. Calls str.rindex element-wise.

Syntax : numpy.core.defchararray.rindex(arr, sub, start = 0, end = None)

Parameters :

arr : [array-like of str or unicode] Array-like of str .

sub : [str or unicode] Input string or unicode.

start, end : [int, optional] Optional arguments start and end are interpreted as in slice notation.

Return : Return the output array of ints.

Code #1 :

Python3

# Python program explaining 
# numpy.char.rindex() function 

# importing numpy as geek  
import numpy as geek 

arr = "GeeksforGeeks - A computer science portal for geeks"
sub = 'science'

gfg = geek.char.rindex(arr, sub)
  
print (gfg)

Output :

27

Code #2 :

Python3

# Python program explaining 
# numpy.char.rindex() function 

# importing numpy as geek  
import numpy as geek 

arr = "GeeksforGeeks - A computer science portal for geeks"
sub = 'geeks'

gfg = geek.char.rindex(arr, sub, start = 0, end = None)
  
print (gfg)