Python - 如何添加整数（可能在列表中？）

Question

I'm doing an assignment for school, I'm up to a part where i have to have the 'User' input a list of integers, the program must then add the integers in the list together and return:

Total: $[sum of integers]

as of yet, i have

cost = input("Enter the expenses: ")
cost = int(cost)
total = sum(i)
print("Total: $" + i)

but it keeps returning the error:

Traceback (most recent call last):
  File "C:\Python33\Did I Spend Too Much.py", line 2, in <module>
    cost = int(cost)
ValueError: invalid literal for int() with base 10: '10 15 9 5 7'

Where '10 15 9 5 7' are the integers I entered in testing.

Any help with this would be greatly appreciated

Answer 1

cost = cost.split()
total = sum([ int(i) for i in cost ])

Answer 2

You have to parse the string. input returns you string as 10 15 9 5 7 so parse that string with (space) and you will get list of str . Convert list of str to int and do sum.

I can give you solution, but best way you tried your self as student. If got any problem, give comments.

Answer 3

You must first convert the string into a list of integers as follows:

cost = cost.split()

cost = [int(i) for i in cost]

and then you can call sum(cost)

Answer 4

You are trying to convert blank spaces to integers as well which is something that is not possible. Instead you need to split the string and then convert all individual elements to ints :)

cost = cost.split()
cost = [ int(i) for i in cost ]
total = sum(total)

Answer 5

您输入的“10 15 9 5 7”无法识别为整数，因为其中有空格，也无法识别为整数列表，您需要进行一些“转换”。

Answer 6

This is my answer

expenses = input("Enter the expenses: ")
expenses = expenses.split()

total = 0
for expense in expenses:
  total += int(expense)
print("Total: $" + str(total))

Answer 7

You need to remove spaces. I am pretty sure commas also work!

[10, 2, 20] # Example

Or: [10220]