how to login in a site and gather informations

a site named digikala. I want to login in this site with python and get some information like points and print it:

https://www.digikala.com/users/login-register

This the URL. When you enter the login page in this link at first its needed to enter username(email address or phone number) then click a button, it will redirect you to another page that you have to enter your password,when password entered it will redirect you to the main page and in that main page informations available and i want that information's.

My question is how can i do this all tasks and login in page and gather informaions needed, which library should i use(i tryed with requests but failed, any segestions ?)