Vending machine help - Printable Version +- Python Forum (https://python-forum.io) +-- Forum: Python Coding (https://python-forum.io/forum-7.html) +--- Forum: Homework (https://python-forum.io/forum-9.html) +--- Thread: Vending machine help (/thread-25555.html) |
Vending machine help - wiggles - Apr-03-2020 Hi, I have a project to build a vending machine that must display items and balance of coins within the machine. I have done some work on it and am stuck on line 31 of my code. I have defined self.total however it is coming back as an invalid syntax? I am happy for you to critique my code however I am completely new to this, and I am trying to keep it simple. I have only completed the code for one item so far in my machine Thanks in advance! class Vending_Machine(object): aussie_coins = (0.05, 0.10, 0.20, 0.50, 1.00, 2.00) items = ['Tea','Coffee', 'Coke', 'Orange Juice'] item_price = [0.50, 1.00, 1.50, 1.00] item_code = [1, 2, 3, 4] def __init__(self): self.total = 0.00 def insert_coin(self,coin): if float(coin) not in (self.aussie_coins): print ('The Vending Machine accepts only: {}. ' .format(self.aussie_coins), end = '') else: self.total += coin print ('Currently there is a total of {: .2f} in machine' .format(self.total)) def menu(): print("Welcome to my Vending Machine") print(item_code[0], items[0], item_price[0]) #using the dict. from vending machine class print(item_code[1], items[1], item_price[1]) print(item_code[2], items[2], item_price[2]) print(item_code[3], items[3], item_price[3]) def user_input(self, choice): choice = input("Please enter the item code of an item you would like to purchase: ") if choice == item_code[0]: print ("You have selected {} - the price is ${.2f}. Currently you have a total of ${.2f} in the machine." .format(items[0], item_price[0], self.total)) while self.total < item_price[0]: #if not the price of tea then.. insert_coin(input("Insert a coin into the vending machine: ")) else self.total >= item_price[0]: self.total -= item_price[0] print('Please take your {}. Total of {:.2f} in the machine' .format(items[0],self.total)) RE: Vending machine help - ndc85430 - Apr-03-2020 You don't have conditions in else statements (line 30). Think about it - "else" means "in the other case", i.e that the preceding condition was False .
RE: Vending machine help - wiggles - Apr-03-2020 Thanks, I went through and adjusted it - seems to have sorted that issues.. I am a little further through, and have got it working until I enter my coin into the machine. I am not sure how to pull a method from my super class? I think I have everything I need to insert into the section but am unable to run that when the user inserts the coin value. It just gives me a value and doesn't call the method? Any help or comments to put me in the right direction will be appreciated!! class Vending_Machine: aussie_coins = (0.05, 0.10, 0.20, 0.50, 1.00, 2.00) items = ['Tea','Coffee', 'Coke', 'Orange Juice'] item_price = [0.50, 1.00, 1.50, 1.00] item_code = ['1', '2', '3', '4'] def __init__(self): self.total = 0.00 def insert_coin(self,coin): if float(coin) not in (self.aussie_coins): print ('The Vending Machine accepts only: {}. ' .format(self.aussie_coins), end = '') else: self.total += coin print ('Currently there is a total of {: .2f} in machine' .format(self.total)) class interface(Vending_Machine): def menu(self): print("##################################") print(" Welcome to My Vending Machine ") print("All items below are readily available") print(Vending_Machine.item_code[0], Vending_Machine.items[0], Vending_Machine.item_price[0]) # print(Vending_Machine.item_code[1], Vending_Machine.items[1], Vending_Machine.item_price[1]) print(Vending_Machine.item_code[2], Vending_Machine.items[2], Vending_Machine.item_price[2]) print(Vending_Machine.item_code[3], Vending_Machine.items[3], Vending_Machine.item_price[3]) print("##################################") class user_input(interface): def choice (self): choice = input("Please enter the item code of an item you would like to purchase: ") if choice == Vending_Machine.item_code[0]: print ("You have selected {} - the price is ${:.2f}. Currently you have a total of ${:.2f} in the machine." .format(Vending_Machine.items[0], Vending_Machine.item_price[0], self.total)) if self.total < Vending_Machine.item_price[0]: #if not the price of tea then.. Vending_Machine.insert_coin = float(input("Insert a coin into the vending machine")) elif self.total > Vending_Machine.item_price[0]: self.total -= Vending_Machine.item_price[0] print('Please take your {}. Total of {:.2f} in the machine' .format(Vending_Machine.items[0],self.total)) elif self.total == Vending_Machine.item_price[0]: self.total -= Vending_Machine.item_price[0] print('Please take your {}. Thanks, have a nice day!'.format(Vending_Machine.items[0])) elif choice == Vending_Machine.item_code[1]: print ("You have selected {} - the price is ${:.2f}. Currently you have a total of ${:.2f} in the machine." .format(Vending_Machine.items[1], Vending_Machine.item_price[1], self.total)) if self.total < Vending_Machine.item_price[1]: #if not the price of tea then.. insert_coin(input("Insert a coin into the vending machine: ")) elif self.total > Vending_Machine.item_price[1]: self.total -= Vending_Machine.item_price[1] print('Please take your {}. Total of {:.2f} in the machine' .format(Vending_Machine.items[1],self.total)) elif self.total == Vending_Machine.item_price[1]: self.total -= Vending_Machine.item_price[1] print('Please take your {}. Thanks, have a nice day!'.format(Vending_Machine.items[1])) elif choice == Vending_Machine.item_code[2]: print ("You have selected {} - the price is ${.2f}. Currently you have a total of ${.2f} in the machine." .format(Vending_Machine.items[2], Vending_Machine.item_price[2], self.total)) if self.total < Vending_Machine.item_price[1]: #if not the price of tea then.. insert_coin(input("Insert a coin into the vending machine: ")) elif self.total > Vending_Machine.item_price[2]: self.total -= Vending_Machine.item_price[2] print('Please take your {}. Total of {:.2f} in the machine' .format(Vending_Machine.items[1],self.total)) elif self.total == Vending_Machine.item_price[2]: self.total -= Vending_Machine.item_price[2] print('Please take your {}. Thanks, have a nice day!'.format(Vending_Machine.items[2])) elif choice == Vending_Machine.item_code[3]: print ("You have selected {} - the price is ${.2f}. Currently you have a total of ${.2f} in the machine." .format(Vending_Machine.items[3], Vending_Machine.item_price[3], self.total)) if self.total < Vending_Machine.item_price[3]: #if not the price of tea then.. insert_coin(input("Insert a coin into the vending machine: ")) elif self.total > Vending_Machine.item_price[3]: self.total -= Vending_Machine.item_price[3] print('Please take your {}. Total of {:.2f} in the machine' .format(Vending_Machine.items[3],self.total)) elif self.total == Vending_Machine.item_price[3]: self.total -= Vending_Machine.item_price[3] print('Please take your {}. Thanks, have a nice day!'.format(Vending_Machine.items[3])) elif choice not in item_code: print("Sorry we do not have item number {} available. Please try again" .format(choice)) vm = Vending_Machine() i1 = interface() u1 = user_input() i1.menu() u1.choice() RE: Vending machine help - ndc85430 - Apr-03-2020 (Apr-03-2020, 05:18 AM)wiggles Wrote: I am not sure how to pull a method from my super class? I think I have everything I need to insert into the section but am unable to run that when the user inserts the coin value. It just gives me a value and doesn't call the method? Any help or comments to put me in the right direction will be appreciated!! I don't really understand what you mean. Can you provide an example (i.e. sample input and output) and a pointer to which lines of code aren't working as you expect? RE: Vending machine help - wiggles - Apr-03-2020 Sure, so I can get my code to run for the project up until it asks to insert a coin (lines 33 - 36). I was trying to pull the method that was Vending_Machine.insert_coin in the Vending Machine class. I think it pulls correctly, as I get the right String output. However, I can't seem to get it to follow on with the rest of the user_input class? It just seems to stop? Thanks Wiggles #creating a dictionary to outline all the drinks in the machine and their price class Vending_Machine: aussie_coins = (0.05, 0.10, 0.20, 0.50, 1.00, 2.00) items = ['Tea','Coffee', 'Coke', 'Orange Juice'] item_price = [0.50, 1.00, 1.50, 1.00] item_code = ['1', '2', '3', '4'] def __init__(self): #define total in vending machine. self.total = 0.00 def insert_coin(self,coin): if float(coin) not in (self.aussie_coins): print ('The Vending Machine accepts only: {}. ' .format(self.aussie_coins), end = '') else: self.total += coin print ('Currently there is a total of ${:.2f} in machine' .format(self.total)) class interface(Vending_Machine): def menu(self): print("##################################") print(" Welcome to Tom's Vending Machine ") print("All items below are readily available") print(Vending_Machine.item_code[0], Vending_Machine.items[0], "${: .2f}".format(Vending_Machine.item_price[0])) # print(Vending_Machine.item_code[1], Vending_Machine.items[1], "${: .2f}".format(Vending_Machine.item_price[1])) print(Vending_Machine.item_code[2], Vending_Machine.items[2], "${: .2f}".format(Vending_Machine.item_price[2])) print(Vending_Machine.item_code[3], Vending_Machine.items[3], "${: .2f}".format(Vending_Machine.item_price[3])) print("##################################") class user_input(interface): def choice (self): choice = input("Please enter the item code of an item you would like to purchase: ") if choice == Vending_Machine.item_code[0]: print ("You have selected {} - the price is ${: .2f}. Currently you have a total of ${: .2f} in the machine." .format(Vending_Machine.items[0], Vending_Machine.item_price[0], self.total)) if self.total < Vending_Machine.item_price[0]: coins = float(input("Insert a coin into the vending machine: ")) Vending_Machine.insert_coin(self,coins) elif self.total > Vending_Machine.item_price[0]: self.total -= Vending_Machine.item_price[0] print('Please take your {}. Total of {: .2f} in the machine' .format(Vending_Machine.items[0],self.total)) elif self.total == Vending_Machine.item_price[0]: self.total -= Vending_Machine.item_price[0] print('Please take your {}. Thanks, have a nice day!'.format(Vending_Machine.items[0])) elif choice == Vending_Machine.item_code[1]: print ("You have selected {} - the price is ${: .2f}. Currently you have a total of ${: .2f} in the machine." .format(Vending_Machine.items[1], Vending_Machine.item_price[1], self.total)) if self.total < Vending_Machine.item_price[1]: insert_coin(input("Insert a coin into the vending machine: ")) elif self.total > Vending_Machine.item_price[1]: self.total -= Vending_Machine.item_price[1] print('Please take your {}. Total of {: .2f} in the machine' .format(Vending_Machine.items[1],self.total)) elif self.total == Vending_Machine.item_price[1]: self.total -= Vending_Machine.item_price[1] print('Please take your {}. Thanks, have a nice day!'.format(Vending_Machine.items[1])) elif choice == Vending_Machine.item_code[2]: print ("You have selected {} - the price is ${: .2f}. Currently you have a total of ${: .2f} in the machine." .format(Vending_Machine.items[2], Vending_Machine.item_price[2], self.total)) if self.total < Vending_Machine.item_price[2]: insert_coin(input("Insert a coin into the vending machine: ")) elif self.total > Vending_Machine.item_price[2]: self.total -= Vending_Machine.item_price[2] print('Please take your {}. Total of {: .2f} in the machine' .format(Vending_Machine.items[2],self.total)) elif self.total == Vending_Machine.item_price[2]: self.total -= Vending_Machine.item_price[2] print('Please take your {}. Thanks, have a nice day!'.format(Vending_Machine.items[2])) elif choice == Vending_Machine.item_code[3]: print ("You have selected {} - the price is ${: .2f}. Currently you have a total of ${: .2f} in the machine." .format(Vending_Machine.items[3], Vending_Machine.item_price[3], self.total)) if self.total < Vending_Machine.item_price[3]: #if not the price of tea then.. insert_coin(input("Insert a coin into the vending machine: ")) elif self.total > Vending_Machine.item_price[3]: self.total -= Vending_Machine.item_price[3] print('Please take your {}. Total of {: .2f} in the machine' .format(Vending_Machine.items[3],self.total)) elif self.total == Vending_Machine.item_price[3]: self.total -= Vending_Machine.item_price[3] print('Please take your {}. Thanks, have a nice day!'.format(Vending_Machine.items[3])) elif choice not in item_code: print("Sorry we do not have item number {} available. Please try again" .format(choice)) vm = Vending_Machine() i1 = interface() u1 = user_input() i1.menu() u1.choice() RE: Vending machine help - wiggles - Apr-04-2020 Righto - so I have gone about this a little different. I have changed up my classes and have the following code with two classes instead of 3. My issue is with lines 36 - 39. I need to reference the input above and depending on y/n input either start the method again, or move onto the next method below (order_product) The second issue is that I am having trouble in my method - order_product, with calling the other parts of the class item (i.e. user inputs a float value that aligns with self.code, I want to confirm they are selecting the right item by displaying the self.name and self.price.. Any feedback would be greatly appreciated! accepted_coins= [0.05, 0.10, 0.20, 0.50, 1.00, 2.00] class Item: def __init__(self, code, name, price): self.code = code self.name = name self.price = price class VendingMachine: def __init__(self): self.items = [ Item(1, "Tea", 0.50), Item(2, "Coffee", 1.00), Item(3, "Coke", 1.50), Item(4, "Orange Juice", 1.00) ] def display_items(self): print("Welcome to my Vending Machine") for code, item in enumerate(self.items, start=1): print(f"[{code}] - {item.name} (${item.price:.2f})") def insert_coin(self): self.total = 0.00 coin = float(input("Please insert your coins: ")) if float(coin) not in (accepted_coins): print ("The Vending Machine accepts only {}" . format(accepted_coins), end = ' ') else: self.total += coin input('Currently there is a total of ${:.2f} in the Machine. Continue to order? y/n' .format(self.total)) if INPUT ABOVE == Y or y: order_product() elif i == N or n: RUN THIS METHOD AGAIN() def order_product(self): choice = float(input("Please insert the item code: ")) if float(choice) == self.code(): print ("You have selected {} for $(:.2f)".format(item.self, item.price)) def main(): vending_machine = VendingMachine() vending_machine.display_items() vending_machine.insert_coin() return 0 if __name__ == "__main__": import sys sys.exit(main()) |