When I need classes?

[Arshpreet Singh]

Hello Friends, I am quite new to OOP(object oriented Programming), I did some projects with python which includes Data-Analysis, Flask Web Development and some simple scripts. 

I have only one question which is bothering me most of the time, When I will get the need to use Classes in Python? Or in other way is there any real-life example where you can tell me this problem/solution is kind of impossible in Python without Classes?