({ test: () => assert(runPython(`
call_lst = _Node(_code).find_function("main").find_whiles()[0].find_bodies()[0].find_calls("print")
test_lst = ["print('\\\\nExpense Tracker')", "print('1. Add an expense')", "print('2. List all expenses')"]
all(call_lst[n].is_equivalent(i) for n, i in enumerate(test_lst))
`)) })

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 = []
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    while True:
        print('\nExpense Tracker')
        print('1. Add an expense')
        
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