Python---shopping extensions

Create a product page that requires

1 , display the commodity name and price correspondence relation

2 , access to user pay level

3 , provide users with the option to buy products function

4 , users purchase finished goods, display user account balance

5, prompt the user whether to continue to purchase

#!/usr/bin/env python     //program starts #file: list.py#date: 2016-01-13import  sys      //Insert module, convenient to call function goods = [' Iphone6 ', ' Quecao ', ' LV ', ' Car ']      //Define items and price List contents prices = [5200,80,750,30000]lists = []              //defines an empty list, similar to a shopping cart Wide = 50title  =  ' Shoplist ' half =  (50 - len (title)  - 2)  // 2      //the variable while true:      //exception handling used by the print header requires that the input wage must be an integer          try:                 wage = int (Raw_input ("Hello, please input your  wages:  "))                  break        except valueerror:                 print  "please input a number, not  String. " while true:        print  "Look the shoplist,  Please input what you want: "        print  ' = '  * 50        print  ' * '  * half +  '   '  + title +  '   '  +  ' * '  * half         print  '%-25s%25s '  % (' Goods ', ' prices ')          print  '-'  * 50        for p in  Goods:                print   "%-25s%25s"  % (P,prices[goods.index (p)])         print  ' = '  * 50                            //Display Menu Contents            Shop = raw_input ("Please input one item to buy:")  .strip ()          if shop ==  ' quit ':      //exit option                 print  " you have bought these things: %s " % lists                 sys.exit ()          elif shop in goods:     //items in the list         &nbsP;        pay = prices[goods.index (Shop)]       //Fetch Price                  print  "%s, %d"  % (Shop,prices[goods.index (shop))                  if wage > pay:         //           when wages are greater than the price               wage -= pay           //Balance after purchase                           Lists.append (Shop)         //add a purchase to an empty list                          print  "Ok, %s put  in list. your wage now left: %d " %  (shop,wage)                  else:                          if wage < min (prices):       //wages greater than the minimum price                                   print  "Your money can ' t  pay for anything. you have bought these things: %s " %  lists                     &nBsp;           sys.exit ()       Exit Page                          else:                                  print  "Sorry, this %s you can ' t put it, please  look other! "  % shop        else:                                     print  "your choice not  In goods! "                 Break 

Note : python2.7, practice using!

This article from "Experience from pain" blog, declined reprint!

Python---shopping extensions