Python - Replace all occurrences of a substring in a string

Sometimes, while working with Python strings, we can have a problem in which we need to replace all occurrences of a substring with other.

Input : test_str = “geeksforgeeks”
s1 = “geeks”
s2 = “abcd”
Output : test_str = “abcdsforabcds”
Explanation : We replace all occurrences of s1 with s2 in test_str.

Input : test_str = “geeksforgeeks”
s1 = “for”
s2 = “abcd”
Output : test_str = “geeksabcdgeeks”

We use maketrans() and translate(). This is inbuild way to perform this task. This function maintains the table internally and performs the task of swapping.

# Python3 code to demonstrate working of  
# Swap Binary substring 
# Using translate() 
  
# initializing string 
test_str = "geeksforgeeks"
  
# printing original string 
print("The original string is : " + test_str) 
  
# Swap Binary substring 
# Using translate() 
temp = str.maketrans("geek", "abcd") 
test_str = test_str.translate(temp) 
  
# printing result  
print("The string after swap : " + str(test_str))  

Output:

The original string is : geeksforgeeks
The string after swap : accdsforaccds

My Personal Notes

Recommended Posts:

manjeet_04

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.