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curriculum/challenges/english/blocks/learn-lambda-functions-by-building-an-expense-tracker/658244fdf4b0265334711664.md

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--description--

Finally, return the result of the filter() call.

--hints--

You should return the result of the filter() call from your filter_expenses_by_category function.

js
({ test: () => assert(runPython(`_Node(_code).find_function("filter_expenses_by_category").has_return("filter(lambda expense: expense['category'] == category, expenses)")`)) })

--seed--

--seed-contents--

py
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))
    
--fcc-editable-region--
def filter_expenses_by_category(expenses, category):
    filter(lambda expense: expense['category'] == category, expenses)
--fcc-editable-region--

expenses = []