提问人：Rendevouz 提问时间：10/13/2023 最后编辑：BarmarRendevouz 更新时间：10/13/2023 访问量：62
连续循环，用户输入购物清单 - 添加总计和打印总计
Continuous Loop with User Input for Shopping List - Adding the Total and Printing Grand Total
问：
- 我创建了一个空字典，所以当用户使用该程序时， 他们购买的物品将被添加。
- 最后，在他们退出程序时打印。
- 我希望用户能够在连续循环中购买，从 产品（此处未看到）的产品，直到他们决定退出该计划。 每次计算每重量的总成本 * - 问题区域!!
- 当用户决定退出 （2） 时，提供/计算总重量 * 价格（每千克） - 不要 知道吗!!
- 我也不能将杂货清单打印到屏幕上 - 在这里发行!!
# dictionary to store productID("ID"), price("price")
#with empty list as their values
groceryList ={"productID":[], "weight": [], "price":[]}
# converting dictionary to list for further updation
buyersList = list(groceryList.values())
# variable iD value of "productID" from dictionary 'buyersList'
iD = buyersList[0]
# variable weight value of "quantity" from dictionary 'buyersList'
kG = buyersList[1]
# variable qu value of "price" from dictionary 'a'
productPrice = buyersList[2]
total = 0
# This loop terminates when user select 2.EXIT option when asked
# in try it will ask user for an option as an integer (1 or 2)
# if correct then proceed with an if/else statement asking for user input
# It should continue and keep adding the total price * weight - BUT THIS FUNCTION DOESN'T WORK
while True:
try:
choice = int(input("1.SELECT\n2.EXIT\nPlease select 1 or 2 (from the menu) here : ")) #use new line formatting
if choice == 1:
i = int(input("Please enter the product ID here : "))
# input quantity of product
w = float(input("Please enter how many KG you would like : "))
p = float(input("Please enter the price of the product here : "))
# append value of in "name", "quantity", "price"
iD.append(i)
# as na = b[0] it will append all the value in the
# list eg: "name":["rice"]
productPrice.append(p)
# after appending new value the sum in price
# as to be calculated
total = lambda w, p: w * p
print("\nYour current total amount is", total(w, p))
elif choice == 2:
break
else:
print("Sorry, that option isn't available. Please, try again.")
except ValueError:
print("Invalid response. Please try again.")
#when user asks to exit loop - their grocery list is printed to screen
print("\n\n\nGROCERY LIST")
for i in range(len(buyersList)):
print(iD[i], kG[i], productPrice[i])
我想打印他们所有选项的总和
答：
0赞
Barmar
10/13/2023
#1
在用户输入重量和价格后，您应该添加 ，而不是将其重新定义为 lambda 函数。然后打印这个变量。w * ptotal
在最后的循环中，您应该遍历 、 和 列表，而不是字典的长度。您可以使用 并行循环访问它们。iDkGproductPricegroceryListzip()
# dictionary to store productID("ID"), price("price")
#with empty list as their values
groceryList ={"productID":[], "weight": [], "price":[]}
# converting dictionary to list for further updation
buyersList = list(groceryList.values())
# variable iD value of "productID" from dictionary 'buyersList'
iD = buyersList[0]
# variable weight value of "quantity" from dictionary 'buyersList'
kG = buyersList[1]
# variable qu value of "price" from dictionary 'a'
productPrice = buyersList[2]
total = 0
# This loop terminates when user select 2.EXIT option when asked
# in try it will ask user for an option as an integer (1 or 2)
# if correct then proceed with an if/else statement asking for user input
# It should continue and keep adding the total price * weight - BUT THIS FUNCTION DOESN'T WORK
while True:
try:
choice = int(input("1.SELECT\n2.EXIT\nPlease select 1 or 2 (from the menu) here : ")) #use new line formatting
if choice == 1:
i = int(input("Please enter the product ID here : "))
# input quantity of product
w = float(input("Please enter how many KG you would like : "))
p = float(input("Please enter the price of the product here : "))
# append value of in "name", "quantity", "price"
iD.append(i)
# as na = b[0] it will append all the value in the
# list eg: "name":["rice"]
kG.append(w)
productPrice.append(p)
# after appending new value the sum in price
# as to be calculated
total += w * p
print("\nYour current total amount is", total)
elif choice == 2:
break
else:
print("Sorry, that option isn't available. Please, try again.")
except ValueError:
print("Invalid response. Please try again.")
#when user asks to exit loop - their grocery list is printed to screen
print("\n\n\nGROCERY LIST")
for id, weight, price in zip(iD, kG, productPrice):
print(id, weight, price)
评论
tryexcept{"id": ###, "weight": ###, "price": ###}range(len(buyersList))应该是 。 始终为 3。range(len(iD))len(buyersList)