Python – Extract String after Nth occurrence of K character



Given a String, extract the string after Nth occurrence of a character.

> **Input** : test_str = ‘geekforgeeks’, K = “e”, N = 2  
>  **Output** : kforgeeks  
>  **Explanation** : After 2nd occur. of “e” string is extracted.
>
>  **Input** : test_str = ‘geekforgeeks’, K = “e”, N = 4  
>  **Output** : ks  
>  **Explanation** : After 4th occur. of “e” string is extracted.

 **Method #1 : Using split()**

This is one of the ways in which this task can be performed. In this we
customize split() to split on Nth occurrence and then print the rear extracted
string using “-1”.

  

  

## Python3

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# Python3 code to demonstrate working of

# Extract String after Nth occurrence of K character 

# Using split()

 

# initializing string

test_str = 'geekforgeeks'

 

# printing original string

print("The original string is : " + str(test_str))

 

# initializing K 

K = "e"

 

# initializing N 

N = 3

 

# using split() to perform required string split

# "-1" to extract required part

res = test_str.split(K, N)[-1]

 

# printing result 

print("The extracted string : " + str(res))   
  
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**Output**

    
    
    The original string is : geekforgeeks

    The extracted string : eks

    

**Method #2 : Using re.split()**

This is yet another way to solve this problem. Similar to above function, we
perform split() to perform task of splitting but from regex library which also
provides flexibility to split on Nth occurrence.

## Python3

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 __

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# Python3 code to demonstrate working of

# Extract String after Nth occurrence of K character 

# Using re.split()

import re

 

# initializing string

test_str = 'geekforgeeks'

 

# printing original string

print("The original string is : " + str(test_str))

 

# initializing K 

K = "e"

 

# initializing N 

N = 3

 

# using split() to perform required string split

# "-1" to extract required part

res = re.split(K, test_str, N)[-1]

 

# printing result 

print("The extracted string : " + str(res))   
  
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**Output**

    
    
    The original string is : geekforgeeks

    The extracted string : eks

    

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