這裏業餘愛好者：爲什麼我不能給這個字符串/變量一個硬幣值？

Question

# Vending Machine Simulation 

print ("Welcome to the vending machine simulation") 

print ("Please enter three coins. Enter as 10 (10p), 20 (20p), 50 (50p) or 100 (£1)") 

c1 = int(input("Please enter your first coin: ")) 
while c1 not in (10, 20, 50, 100): 
    print("That is not an accepted coin value") 
    c1 = int(input("Please re-enter your first coin: ")) 

c2 = int(input("Please enter your second coin: ")) 
while c2 not in (10, 20, 50, 100): 
    print("That is not an accepted coin value") 
    c2 = int(input("Please re-enter your second coin: ")) 

c3 = int(input("Please enter your third coin: ")) 
while c3 not in (10, 20, 50, 100): 
    print("That is not an accepted coin value") 
    c3 = int(input("Please re-enter your third coin: ")) 

total = int(c1 + c2 + c3) 
print ("You have",total," in credit.") 

print ("Thank you for entering your coins. Prices: Hydration: £1, Nutrition: 60p") 

Hydration = ("Cola","Fanta","Coffee") 
Nutrition = ("Bacon", "Steak","Beans") 

print ("Hydration Menu:") 
print (Hydration) 
print ("Nutrition Menu:") 
print (Nutrition) 

cost =[] 
cost[Hydration] = 100 
cost[Nutrition] = 60 

pro1 = input ("What would you like, sir/madam?: ") 

while pro1 not in (Hydration, Nutrition): 
    print (total) 
    pro1 = input ("You entered an invalid term. What would you like, sir/madam?: ") 

while cost[pro1] > total: 
    print ("You do not have enough credit to purchase this product.") 
    pro1 = input ("What would you like, sir/madam?: ") 
if cost[pro1] < total: 
    total = total - cost[pro1] 
    print ("Thank you.",total) 

pro2 = input ("Would you like anything else, sir/madam?: ") 

while pro2 not in (Hydration, Nutrition): 
    print (total) 
    pro2 = input ("You entered an invalid term. What would you like, sir/madam?: ") 

while cost[pro2] > total: 
    print ("You do not have enough credit to purchase this product.") 
    pro2 = input ("Would you like anything else, sir/madam?: ") 
if cost[pro2] < total: 
    total = total - cost[pro2] 
    print ("Thank you.",total) 

pro3 = input ("You have quite the appetite. Would you like anything else, sir/madam?: ") 

while pro3 not in (Hydration, Nutrition): 
    print (total) 
    pro3 = input ("You entered an invalid term. What would you like, sir/madam?: ") 

while cost[pro3] > total: 
    print ("You do not have enough credit to purchase this product.") 
    pro3 = input ("Would you like anything else, sir/madam?: ") 
if cost[pro3] < total: 
    total = total - cost[pro3] 
    print ("Thank you.",total) 

我已經上傳了我的全部代碼，因爲我猜那裏會是我離開了，你需要知道的位。

我會嘗試把我在用粗體的問題位，但沒有奏效。所以，

Hydration = ("Cola","Fanta","Coffee") 
Nutrition = ("Bacon", "Steak","Beans") 

print ("Hydration Menu:") 
print (Hydration) 
print ("Nutrition Menu:") 
print (Nutrition) 

cost =[] 
cost[Hydration] = 100 
cost[Nutrition] = 60 

我試圖將變量分配的營養和水分爲60和100的值，所以該方案將知道多少從您的信用卡拿走，但它一直返回該變量「成本' 沒有定義。此外，代碼似乎沒有認識到產品（如上所示）是有效的條款，儘管它們應該連接到變量水合和營養。

正如你所看到的，我不是藝術的代碼非常熟悉。這就是爲什麼我需要幫助。先謝謝你。

Answer 1

，你需要一本字典不是一個列表

cost ={} 
cost["Hydration"] = 100 
cost["Nutrition"] = 60 
print cost["Nutrition"] 

或者你想將成本與水化列表中的每個成員

costs_hydration = [100,100,100] 
costs_nutrition = [60,60,60] 
costs = {} 
costs.update(dict(zip(Hydration,costs_hydration))) 
costs.update(dict(zip(Nutrition,costs_nutrition))) 
print costs["Beans"]