Python Shopping Cart program code

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Code:

Created on September 4, 2017 @author: len ' product_list = [(' Robot ', 200000), (' MacPro ', 12000), (' Iphone8 ', 8888) , (' Hello world ', +),] shopping_list = [] User_salary=input ("Please enter your salary:") if User_salary.isdigit (): User_sal  ary = Int (user_salary) while True:print ("Commodity as follows:") for Index,item in Enumerate (product_list): Print       (index,item) User_choice = input ("Please enter the product number to be purchased:") if User_choice.isdigit (): user_choice = Int (user_choice) If User_choice < Len (product_list) and user_choice > -1:p_item = product_list[user_choice] If USER_SALARY&GT;=P_ITEM[1]: Shopping_list.append (p_item) user_salary-=p_item[1] Print ("Purchase goods", P_item, "Success your balance for", user_salary, "Yuan!" Else:print ("Your balance is", user_salary, "the balance is not enough to buy this item, the purchase failed!") ") Else:print (" There is no such product! ")         ") elif User_choice = =" Q ": Print ("--------shopping list-------") for I in Shopping_list:Print (i) exit () Else:print ("invalidate!!! ")

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