how to change a strings letter in python code example

Example 1: how to change character in string python

>>> s = list("Hello zorld")
>>> s
['H', 'e', 'l', 'l', 'o', ' ', 'z', 'o', 'r', 'l', 'd']
>>> s[6] = 'W'
>>> s
['H', 'e', 'l', 'l', 'o', ' ', 'W', 'o', 'r', 'l', 'd']
>>> "".join(s)
'Hello World'

Example 2: python change character in string

mytext = 'Hello Zorld'
mytext = mytext.replace('Z', 'W')
print mytext,