Numpy字符串操作 | rindex()函数

numpy.core.defchararray.rindex()函数，当找不到子字符串 sub 时引发 ValueError。按元素调用 str.rindex。

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.

代码#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)

输出 ：

27

代码#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)

输出 ：

46