Hi, I'd just like to ask if we could use the sum function in the exercise, as in sum(days, city, nights) instead of the: def trip_cost(city, days): return hotel_cost(days) + plane_ride_cost(city) + rental_car_cost(days) That i see the forum using. And if we cannot use the sum function, why not? Thank you for your time!
sum() is usually utilized to count the sum of a list, so I recommend doing a list, that includes all the items that you must return.
cost = [rental_car_cost(days), plane_ride_cost(city), hotel_cost(days)]
After this you can return sum() of cost, and do whatever you want with it.
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