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curriculum/challenges/english/blocks/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md

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--description--

In the total_expenses function, you'll now integrate a lambda function. Replace pass with a lambda function that has expense as its parameter.

expense is expected to be a dictionary, and your lambda function should return the value of the 'amount' key in the expense dictionary.

--hints--

You should create a lambda function that uses the parameter expense and returns expense['amount'] in your total_expenses function.

js
({ test: () => assert(runPython(`_Node(_code).find_function("total_expenses").has_stmt("lambda expense: expense['amount']")`)) })

You should not have pass in your total_expenses function.

js
({ test: () => assert.isFalse(runPython(`_Node(_code).find_function("total_expenses").has_pass()`)) })

--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"]}')
    
--fcc-editable-region--
def total_expenses(expenses):
    pass
--fcc-editable-region--

expenses = []