我如何使用數組來獲取用戶輸入

Question

然后我需要從用戶那里請求 3 個項目，

1. 從用戶那里請求這三個項目的價格
2. 計算三者的總和
3. 計算平均值
4. 打印一個聲明說“產品1，產品2，產品3的總和是xxxx，平均值是xxxx

我嘗試使用 6 個字符串（因此 3 個用於產品，3 個用於價格），因此我可以分別調用每個值。 但后來有人告訴我，數組會大大縮短代碼並將其整理好，所以我嘗試了這樣做，但我正在努力將其調用。 我知道如何計算平均值和總數，但我在數組部分苦苦掙扎。

 products = []
 products = input("Please enter three shopping products: ")

然后打印代碼並允許我輸入 3 個產品，如下所示： 請輸入三個購物產品：洗發水、肥皂、面包（我仍然需要通過數組詢問每個產品的價格）

shopping = products[0]
 print(shopping)
 S

我嘗試的第一種方法是 6 個字符串，如下所示：

product1 = input("Please enter a shopping item: ")
product2 = input("Please enter a second shopping item: ")
product3 = input("Please enter a third shopping item: ")
price1 = input("Please enter the price for the first shopping item: ")
price2 = input("Please enter the price for the second shopping item: ")
price3 = input("Please enter the price for the third shopping item: ")

它打印問題並允許我輸入，但看起來不太整潔。 我現在需要計算價格的平均值以及總價（我可以在沒有數組的情況下進行計算，但如果我使用數組則令人困惑）我希望我的最終結果是：

[product1], [product2], [product3] 的總價為 Rxx, xx，商品的平均價格為 Rxx, xx。

Answer 1

products = []
prices = []
for i in range (0,3):
    product = raw_input("Enter your Item to the List: ")
    products.append(product)
for j in range (0,3):
    price = float(raw_input("Enter your price to the List: "))
    prices.append(price)
print "The total of products is " + str(sum(prices)) + " and the average price is " + str(sum(prices)/3)

Answer 2

您可以將輸入拆分為一個數組，這將大大縮短代碼。

products = input("Please enter three shopping products (Seperated by comma): ")
result = [x.strip() for x in products.split(',')]

這將去除一串空格，但將它們放入一個數組中。

Answer 3

itemsList = []
priceList = []


for i in range(1,4):
    itemStr = "Enter the {} shopping item: ".format(i)
    itemsList.append(input(itemStr))
    priceStr = "Enter the price of {} shopping item: ".format(itemsList[i-1])
    priceList.append(int(input(priceStr)))

print("The Total of {}, {}, {} is {} and the average price of the items are {}".format(*itemsList, sum(priceList), sum(priceList) / float(len(priceList))))

輸出：

Enter the 1 shopping item: shopping_item_1
Enter the price of shopping_item_1: 1
Enter the 2 shopping item: shopping_item_2
Enter the price of shopping_item_2: 2
Enter the 3 shopping item: shopping_item_3
Enter the price of shopping_item_3: 3
The Total of shopping_item_1, shopping_item_2, shopping_item_3 is 6 and the average price of the items are 2.0

編輯：

如果購物項目是獨一無二的，我建議使用dict方法，將items作為keys ，將prices作為values ：

n = int(input("Enter the total items: "))
shoppingDict = {}

for i in range(n):
    keys = input("Enter the shopping item: ")
    values = int(input("Enter the price of item: "))
    shoppingDict[keys] = values

print("The Total of {}, {}, {} is {} and the average price of the items are {}".format(*shoppingDict.keys(), sum(shoppingDict.values()), sum(shoppingDict.values()) / float(sum(shoppingDict.values()))))

輸出：

Enter the total items: 3
Enter the shopping item: shopping_item_1
Enter the price of item: 1
Enter the shopping item: shopping_item_2
Enter the price of item: 2
Enter the shopping item: shopping_item_3
Enter the price of item: 3

The Total of shopping_item_1, shopping_item_2, shopping_item_3 is 6 and the average price of the items are 1.0

Answer 4

class ShoppingItem:
    price = 0
    name = ""

    def __init__(self, name, price):
        self.price = price
        self.name = name


shoppingItems = []

for i in range(0, 3):
    productName = input("Please enter a shopping item: ")
    price = input("Please enter a price for the shopping item: ")
    shoppingItems.append(ShoppingItem(productName, price))


total = sum(i.price for i in shoppingItems)
average = total/len(shoppingItems))