Python Exercises _ Easy Shopping cart

Proposition:

1. After you start the program, let the user enter the payroll, and then print the list of items
2. Allow users to purchase items based on their product number
3. After the user selects the product, checks whether the balance is enough, enough on the direct debit, enough to remind
4. You can exit at any time to print the purchased goods and balances when exiting

Pseudo code

Shopping_car =[]balance= Input usr's Balance(Check parameter's legality) whileTRUE {Show Commodity list choice=user InputifChoice.isdigit {ifChoice >Number of commodity{Print("Invalid input")            Continue} Item=Commodity[choice]ifItem.price <Balance {shopping_car.append (item) Balance-=Item.pricePrint("Item Add success, balance:%d")        }        Else{            Print("balance is not enough!")        }    }    Else{        ifChoice = ='Q'{            Print("your shopping things & balance")             Break        }Else {            Print("Invalid input")        }    }}

Source:

#!/usr/local/bin/python3.5Importsyscommodity= [    ("iphone", 5888),    ("MacBook", 12888),    ("Starbark", 60),    ("Bike", 1000)]shopping_car= [] whiletrue:balance= Input ("Input your balance:")    ifBalance.isdigit ():#Check if it's plastic.balance = Int (balance)#type conversion Shaping         Break    Else:        ifBalance = ='Q': Sys.exit (0)Else:            Print("----->invalied Input!!!") whileTrue: forIndex, CLinchEnumerate (commodity):#for list, the function converts it to an index sequence        Print("\ n", index, CL) UC= Input ("Input your choice:")#Input Selection    ifuc.isdigit (): UC=Int (UC)ifUC < Len (commodity) andUC >=0:item=Commodity[uc]ifITEM[1] <=balance:shopping_car.append (item) Balance-= Item[1]                Print("%s Add shopping car sucess!"%item[0])Else:                Print("your balance is not enough!")        Else:            Print("------->invalid input!")    elifUC = ='Q':        Print("----------Shopping list-----------")         forCinchShopping_car:Print(c)Print("your balance:%d"%balance) Break; Else:        Print("------->invalid Option")

Python Exercises _ Easy Shopping cart