# Learn Lambda Functions by Building an Expense Tracker - Step 14

### Tell us what’s happening:

What is happening in this? There is no list() function lol.

``````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"]}')

def total_expenses(expenses):
pass

# User Editable Region

test = lambda x: x * 2
print(map(test, [2, 3, 5, 8]))

# User Editable Region

expenses = []
``````

User Agent is: `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36`

### Challenge Information:

Learn Lambda Functions by Building an Expense Tracker - Step 14

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you need to add the `list` function in this step, and pass the `map` you have as argument

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test = lambda x: x * 2

list(print(map(test, [2, 3, 5, 8])))

Like this? Still not working

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no, do not pass `print` as argument of `list`, pass `map` as argument of `list`, and `list` as argument of `print`

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I got it! The print had to have the parentheses with the list function within it! Thank you for your responses and have a wonderful day!

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