Python | Replace multiple characters at once
The replacement of one character with another is a common problem that every python programmer would have worked with in the past. But sometimes, we require a simple one line solution which can perform this particular task. Let’s discuss certain ways in which this task can be performed.
Method #1 : Using nested replace()
This problem can be solved using the nested replace method, which internally would create a temp. variable to hold the intermediate replacement state.
# Python3 code to demonstrate working of# Replace multiple characters at once# Using nested replace() # initializing string test_str = "abbabba" # printing original string print("The original string is : " + str(test_str)) # Using nested replace()# Replace multiple characters at onceres = test_str.replace('a', '%temp%').replace('b', 'a').replace('%temp%', 'b') # printing result print("The string after replacement of positions : " + res) |
Output :
The original string is : abbabba The string after replacement of positions : baabaab
Method #2 : Using translate() + maketrans()
There is also a dedication function which can perform this type of replacement task in a single line hence this is a recommended way to solve this particular problem. Works only in Python2.
# Python code to demonstrate working of# Replace multiple characters at once# Using translate() + maketrans()import string # initializing string test_str = "abbabba" # printing original string print("The original string is : " + str(test_str)) # Using translate() + maketrans()# Replace multiple characters at onceres = test_str.translate(string.maketrans("ab", "ba")) # printing result print("The string after replacement of positions : " + res) |
Output :
The original string is : abbabba The string after replacement of positions : baabaab
Last Updated on November 13, 2021 by admin