question related to formatting . Usage of format() in python

could anyone explain how format() works in python? where to use it, and how to use it?. I am not getting even I about this keyword

>Solution :

You can regarding it as a kind of string replacement.

{} part in the string -> string.format() content

Definition: https://www.w3schools.com/python/ref_string_format.asp

A pratical example can be like this:

base_url = 'www.xxxx.com/test?page={}'
for i in range(10):
    url = base_url.format(i)
    do sth