how to replace an index in a string python code example

Example 1: python string replace index

# strings are immutable in Python, 
# we have to create a new string which 
# includes the value at the desired index

s = s[:index] + newstring + s[index + 1:]

Example 2: find string in string python

>>> str = "Messi is the best soccer player"
>>> "soccer" in str
True
>>> "football" in str
False