def change_customer_attribute(customer_id, attribute_name, new_value):
try:
Customer.change_attribute(customer_id, attribute_name, new_value)
except ValueError:
print('Incorrect argument entered')
def change_car_attribute(car, attribute_name, new_value):
value = Customer.find(**{'cars': car})[0].cars
value[0].update({attribute_name: new_value})
Customer.change_attribute(
Customer.find(**{'cars': car})[0]._id, 'cars', value)