Python shopping cart

Python shopping cart

 1 msg_list = [
 2         ['iphone',8888],
 3         ['coffe',38],
 4         ['book',90],
 5         ['Tesla',100000],
 6         ['RR',1000000000]
 7     ]
 8 
 9 
10 shopping_cart = []
11 
12 salary = int(input('input your salary: ' ))
 13  
14  while True:
 15      #Counter , assign 
16 to the items in the list      index = 0
 17      #loop the list msg_list, and print 
18      for product in msg_list:
 19          print (index,product)
 20          index += 1
 21      #Enter the item number to be selected 
22      choice = input( ' >>: ' ).strip()
 23      # Judge the type of input to see if it is a number, isdigit is the way to judge whether it is a number 
24      if choice. isdigit():
 25          #Determine whether the input number is within the range of the index value of the list 
26          choice = int(choice)
 27          if choice >= 0 and choice <= len(msg_list):
 28              #The product exists, get the product. 
29              product = msg_list[choice]
 30              #Determine whether the amount entered is affordable. 
31              if product[1] <= salary:
 32                  #Affordable , and add it to the shopping cart. 
33                  shopping_cart.append(product)
 34                  #The total amount minus the money added to the shopping cart 
35                  salary -= product[1 ]
 36                  # \033[31;1m XXXXXXXX \033[0m Fixed writing, you can change the font color of XXXXXX
37                  print ( ' Added product: ' + product[0] + ' into shopping cart, \033[31;1myour current\033[0m balance: ' + str(salary))
 38              else :
 39                  print ( ' Can't afford it , the product price is ' + str(product[1]) + " not yet " + str(product[1] -salary ) + ' money ' )
 40 else :
 41 print ( ' product does not exist ' )
 42 elif choice == ' q '                           :
 43          print ( ' ------- Purchased items------- ' )
 44  
45          for i in shopping_cart:
 46              print (i)
 47  
48          print ( ' Your balance is: ' ,salary)
 49          print ( ' --------- end---------- ' )
 50          break 
51      else :
 52          print ( ' no such option ' )