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How to Replace Substring in a String Python| Python Tutorial
Include different methods with various examples
4 min readOct 19, 2022
As Python developers, we know that strings are ordered collections of characters.
We can use strings to represent and store text and byte-based information.
Immutable sequences
Strings are immutable sequences.
It means that no programmer can make changes to a string by directly assigning something to an index.
When a developer writes code in multiple languages, they often forget that strings in Python are immutable.
But any developer should remember that strings are immutable in python.
Example
str = "Hello"str[3] = 'y'print(str)
#Result:
TypeError: 'str' object does not support item assignment
How to make changes to a string
If strings are immutable, how can we make changes to the string?
To make changes to a string, you need to create a new string using different tools, such as concatenation and string methods, and then reassign it to the name of the old string.
