# Learn Lambda Functions by Building an Expense Tracker - Step 33

### Tell us what’s happening:

hi, i dont seem to know why my function is unable to pass, could someone please guide me on how to pass

``````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):
return sum(map(lambda expense: expense['amount'], expenses))

def filter_expenses_by_category(expenses, category):
return filter(lambda expense: expense['category'] == category, expenses)

def main():
expenses = []
while True:
print('\nExpense Tracker')
print('2. List all expenses')
print('3. Show total expenses')
print('4. Filter expenses by category')
print('5. Exit')

choice = input('Enter your choice: ')

/* User Editable Region */

if choice == '1':
amount = float(input('Enter amount: '))
category = input('Enter category: ')

/* User Editable Region */

``````

User Agent is: `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36`

### Challenge Information:

Learn Lambda Functions by Building an Expense Tracker - Step 33

Hi. You are trying to define a new function. The function was already created before, you just have to call it. Hope this helps!

2 Likes

yep it works now, thank you for the guidance!

1 Like

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