To summarize, this program have a data in list format, consisting of username, and their subscription plan, and years of their subscription Thera are 2 class, User() and NewUser() class user has 3 method : check_benefit (to see all benefits and price of subscription types), check_plan(to see the username's subs plan) , and upgrade_plan(to upgrade existing user to a higher subs plan)

I uploaded the file in the form of Ipnyb. I am still looking to push the program from Jupyter Notebook to Github in a more proper way