In-Place String Modifications in Python Last Updated : 05 Dec, 2024 Comments Improve Suggest changes Like Article Like Report Strings are immutable in Python, meaning their values cannot be modified directly after creation. However, we can simulate in-place string modifications using techniques such as string slicing and conversion to mutable data types like lists.Using String SlicingString slicing is one of the most efficient ways for small changes. It creates a new string with modifications but is faster than other methods for simple replacements or rearrangements. Python s = "banana" s = s[:1] +'A' +s[2:] print(s) OutputbAnana Let's explore some other ways for In-Place String Modifications in Python:Table of ContentUsing Lists for Mutable OperationsUsing str.replace() Using Regular ExpressionsUsing Lists for Mutable OperationsConverting string to list allows in-place modifications. After changes, the list is converted back to a string. Python s = "banana" s_list = list(s) # Modify the second character s_list[1] = 'A' # Convert back to string s = ''.join(s_list) print(s) OutputbAnana Using str.replace() We can use simple replacements for string replacements, replace() is concise. This method is easy to use and concise for small-scale replacements. Python s = "banana" s = s.replace('a', 'A') print(s) OutputbAnAnA Using Regular ExpressionsRegular expressions provide a powerful way to modify strings based on patterns. It is particularly useful for complex modifications beyond simple replacements. Python import re s = "banana" s = re.sub(r'a', 'A', s) print(s) OutputbAnAnA Comment More infoAdvertise with us Next Article In-Place String Modifications in Python K khushidg6jy Follow Improve Article Tags : Python Python Programs python-string Python string-programs Practice Tags : python Similar Reads Word location in String - Python Word location in String problem in Python involves finding the position of a specific word or substring within a given string. This problem can be approached using various methods in Python, such as using the find(), index() methods or by regular expressions with the re module.Using str.find()str.fi 4 min read Multiple Indices Replace in String - Python In this problem, we have to replace the characters in a string at multiple specified indices and the following methods demonstrate how to perform this operation efficiently:Using loop and join()join() is a brute force method where we first convert the string into a list then we iterate through the l 3 min read Python - Add Phrase in middle of String Given a String, add a phrase in the middle of it. Input : test_str = 'geekforgeeks is for geeks', mid_str = "good" Output : geekforgeeks is good for geeks Explanation : Added just in middle, after 2 words. Input : test_str = 'geekforgeeks best', mid_str = "is" Output : geekforgeeks is best Explanati 7 min read List of strings in Python A list of strings in Python stores multiple strings together. In this article, weâll explore how to create, modify and work with lists of strings using simple examples.Creating a List of StringsWe can use square brackets [] and separate each string with a comma to create a list of strings.Pythona = 2 min read Insert a number in string - Python We are given a string and a number, and our task is to insert the number into the string. This can be useful when generating dynamic messages, formatting output, or constructing data strings. For example, if we have a number like 42 and a string like "The number is", then the output will be "The num 2 min read Like