Python Learning: Shopping Programs

I. Scripting requirements

• After starting the program, let the user enter the payroll, and then print the list of items;

• Allows the user to purchase goods according to the product number;

• After the user selects the product, checks whether the balance is enough, enough on the direct debit, insufficient on the reminder;

• Checkout cart, print purchased goods and balances;

• May withdraw from the program at any time;
  

Two. Knowledge points related to Python

• Comments

• Variable

• User input
  

• Listing (list)

• Tuple (tuple)

• Numeric operations
  

• If process statement

• While Loop statement

• For Loop statement

Three. Scripts

#!/usr/bin/env python3#author=guoxhmenu=[     (' iphone 7 ', 6300),      (' Macbookpro ', 12000),     (' Mechanical keyboard ', 380),     (' python  tutorial ,     (' cooker ', 650)]ps= ' ps:  Enter the product into the shopping cart;     enter Q or quit the shopping program;      Enter W or W to settle the cart (showing the goods and balances that have been purchased); "' Shoppingcart=[]salary=input (' Please enter your payroll: ') if  Salary.isdigit ():     salary=int (Salary) print ("--------shopping list------") for q  in menu:    print (Menu.index (q), q) print (PS) while true:     choice=input (' Please select the product number you want to buy: ')     if choice.isdigit ():         choice=int (choice)         if choice<  len (menu):             if menu[choice][1 ] < salary: &Nbsp;              shoppingcart.append ( Menu[choice])                  salary=salary-menu[choice][1]                 print ("You have already", menu[choice][0], "Add to cart, your balance is:", salary)              else:                 print ("Your balance is:", salary, ", cannot afford:", menu[choice][0])          else:            print (" The item you entered does not exist, please re-enter ... ")             continue     elif choice ==  ' W '  or choice ==  ' W ':         if Shoppingcart:            print ("Goods you have purchased:")              print ("---------------")              for i in shoppingcart:                 print (i[0])              print ("---------------")              print (">>> You now have a total surplus:", salary)              break    elif choice ==  ' Q '   or choice ==  ' Quit ':             Print ("You have exited the shopping process, this time did not buy any goods, welcome to visit again!") ") &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;BREAK&NBSP;&NBSP;&NBSP;&NBSp;else:        print ("The item you entered does not exist, please re-enter!") 

Four. Test scripts

Please enter your total wage: 10000--------Shopping List------0 (' Iphone 7 ', 6300) 1 (' Macbookpro ', 12000) 2 (' Mechanical keyboard ', 380) 3 (' Python tutorial ', 80) 4 (    ' Induction cooker ', 650 PS: Enter the number to add the item to the shopping cart; Enter Q or quit to exit the shopping process; Enter W or W to settle the cart (showing the goods and balances that have been purchased); Select the item number you want to buy: 0 You have added Iphone 7 to your cart and your balance is: 3700 Please select the item number you wish to purchase: 2 You have added the mechanical keyboard to your cart, and your balance is: 3320 Select the item number you want to buy: 1 Your balance is: 3320, cannot afford: Macbookpro Please select the item number you wish to purchase: 3 You have added the Python tutorial to your shopping cart, your balance is: 3240 Please select the item number you want to buy: 4 you have the cooker To add to your cart, your balance is: 2590 Please select the item number you wish to purchase: 5 The item you entered does not exist, please re-enter .... Please select the item number you want to buy: W you have purchased:---------------Iphone 7 mechanical Keyboard Python tutorial Cooker--------------->>> You now have a total of the remaining: 2590

This article is from "Big Brother next Door" blog, please be sure to keep this source http://guoxh.blog.51cto.com/10976315/1932110

Python Learning: Shopping Programs