trips

#!/usr/bin/env python3

from collections import namedtuple

Trip = namedtuple("Trip", "name expenses lodgingcost bagcost")


def prompt(message):
    return input(message + "  => ").strip()


def prompt_number(question):
    while True:
        try:
            return float(prompt(question))
        except ValueError:
            print("That isn't a number.")


def get_trip():
    destination = prompt("Leave empty for no answer. What destination for the trip?")
    if not destination:
        return None

    return Trip(
        destination,
        prompt_number("What were yout transit expenses for your {!r} trip?".format(destination)),
        prompt_number("What was the cost of lodging for your {!r} trip?".format(destination)),
        50 * prompt_number("How many bags did you check for your trip to {!r}?".format(destination)))


trips = []
while True:
    trip = get_trip()
    if not trip:
        break
    trips.append(trip)


trips.sort(key=lambda t: (t.expenses+t.lodgingcost+t.bagcost), reverse=True)
total = sum(trip.expenses + trip.lodgingcost + trip.bagcost for trip in trips)

print("The total cost for all trips is: {:0.02f}".format(total))
for trip in trips:
    trip_sum = trip.expenses + trip.lodgingcost + trip.bagcost
    fraction = trip_sum / total
    print()
    print("The total cost for your {} trip is: {:0.02f}".format(trip.name, trip_sum))
    print("Your trip to {} made up {}% of the total cost of all trips".format(trip.name, fraction*100))
    

if trips:
    print("Your most expensive trip was {}".format(trips[0].name))

https://gist.github.com/solomoncarnes/de32e70afa92e1fcf083137fabeab360