Python | Split string on Kth Occurrence of Character

Many problems of split has been dealt with in past, but sometimes, one can also encounter this problem in which we need to split the string on the Kth occurrence of character. Let’s discuss certain ways in which this problem can be solved.

Method #1 : Using split() + join()
The split and join method can perform this particular task. In this, we split the string on basis of character and according to K, we perform a rejoin using the nested join method.

# Python3 code to demonstrate working of 
# Split string on Kth Occurrence of Character 
# Using split() + join() 
  
# initializing string  
test_str = "Geeks_for_Geeks_is_best"
  
# split char  
splt_char = "_"
  
# initializing K  
K = 3
  
# printing original string  
print("The original string is : " + str(test_str)) 
  
# Using split() + join() 
# Split string on Kth Occurrence of Character 
temp = test_str.split(splt_char) 
res = splt_char.join(temp[:K]), splt_char.join(temp[K:]) 
  
# printing result  
print("Is list after Kth split is : " + str(list(res))) 

Output :

The original string is : Geeks_for_Geeks_is_best
Is list after Kth split is : ['Geeks_for_Geeks', 'is_best']

Method #2 : Using regex
This problem can also be solved using the regex to perform this particular task. Along with slicing, the finditer method of regex library can help to achieve this particular task.

# Python3 code to demonstrate working of 
# Split string on Kth Occurrence of Character 
# Using regex 
import re 
  
# initializing string  
test_str = "Geeks_for_Geeks_is_best"
  
# split char  
splt_char = "_"
  
# initializing K  
K = 3
  
# printing original string  
print("The original string is : " + str(test_str)) 
  
# Using regex 
# Split string on Kth Occurrence of Character 
temp = [x.start() for x in re.finditer(splt_char, test_str)] 
res1 = test_str[0:temp[K - 1]] 
res2 = test_str[temp[K - 1] + 1:] 
res = (res1 + " " + res2).split(" ") 
  
# printing result  
print("Is list after Kth split is : " + str(res)) 

Output :

The original string is : Geeks_for_Geeks_is_best
Is list after Kth split is : ['Geeks_for_Geeks', 'is_best']

My Personal Notes

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