Using sum() in a list

Question

I'm a bit new to coding and I have a school project where we have to make a code using python, in the code we get an input from the user and need to add it together in a list, this is the code:

x = input("Enter the expenses: ")
y = x.split()
n = sum(y)
print("Total: $"+ n +"")

I have looked all over the internet and apparently this is correct but for some reason I always get an error saying:

Traceback (most recent call last):
  File "program.py", line 3, in <module>
    n = sum(y)
TypeError: unsupported operand type(s) for +: 'int' and 'str'

What am I doing wrong?

right, because y contains strings you need to map them to int — Patrick Parker, Mar 04 '21 at 00:10

score 0 · Answer 1 · answered Mar 04 '21 at 00:07

0

The elements of y are strings so you can't sum it up. Change then to ints first like:

y = list(map(int, y))

and then do the sum

answered Mar 04 '21 at 00:07

user15270287

1,123
4
11

1

Note: If you don't otherwise need the values, you can omit the `list()` wrapping; `map` itself returns an iterator that `sum` can consume, it'll just be exhausted by `sum`. `list`'ll let you store all the values and reuse them. – ShadowRanger Mar 04 '21 at 00:10
It says that 'Y is not defined' – Caleb Mar 04 '21 at 00:10
Your variable is lower case y – user15270287 Mar 04 '21 at 00:11
my bad, it says 'y is not defined' – Caleb Mar 04 '21 at 00:12
Are you running it after this line: `y = x.split()` – user15270287 Mar 04 '21 at 00:14

Using sum() in a list

1 Answers1