Learn Lambda Functions by Building an Expense Tracker - Step 18

Python
1

Python It asks me to sum the map thats what i did and the advice gave me th eanswer clearly i applied it but it still doesnt work. can i have some help pls?

Your code so far

def add_expense(expenses, amount, category):
    expenses.append({'amount': amount, 'category': category})
    
def print_expenses(expenses):
    for expense in expenses:
        print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
    

/* User Editable Region */

def total_expenses(expenses):
    sum(map(lambda expense: expense['amount'], expenses))

/* User Editable Region */


expenses = []

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Challenge Information:

Learn Lambda Functions by Building an Expense Tracker - Step 18

2

Hello

You almost have it. You just need to return the result (hint: same line).

1 Like
3 
return sum(map(lambda expense: expense['amount'], expenses))

still not working

4

If you have a question about a specific challenge as it relates to your written code for that challenge and need some help, click the Ask for Help button located on the challenge (it looks like a question mark). This button only appears if you have tried to submit an answer at least three times.

The Ask for Help button will create a new topic with all code you have written and include a link to the challenge also. You will still be able to ask any questions in the post before submitting it to the forum.

Thank you.

5

That should work. Check the formatting (indentation)?

1 Like
6

It’ll definitely work if you fix the indentation.

7

why does it not return it automatically when it is a lambda function?

8

The instructions ask:

return the result.

So you need the function to return something.