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curriculum/challenges/english/blocks/learn-lambda-functions-by-building-an-expense-tracker/65823e87c9741750a22085a7.md

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--description--

Next, define a function named filter_expenses_by_category that takes two parameters: expenses and category. Use pass to fill the function body.

--hints--

You should define a function named filter_expenses_by_category.

js
({ test: () => assert(runPython(`
    import inspect    
    inspect.isfunction(filter_expenses_by_category)
  `))
})

Your filter_expenses_by_category function should take expenses and category as the parameters.

js
({ test: () => assert(runPython(`
    import inspect    
    sig = str(inspect.signature(filter_expenses_by_category))
    sig == '(expenses, category)'
  `))
})

--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--

--fcc-editable-region--

expenses = []