4/7 Taking a Vacation Odd errors...

city = raw_input("Type the city you're visiting."
)
nights = raw_input("How many nights will you be staying for?")
def hotel_cost(nights):
    if nights:
        print
        return 140 * nights
def plane_ride_cost(city):
    if city == "Charlotte":
        print
        return 183
    elif city == "Tampa":
        print
        return 220
    elif city == "Pittsburgh":
        return 222
        print
    elif city == "Los Angeles":
        return 475
        print
    else:
        return "Please enter a valid location/amount of nights"

print plane_ride_cost
print hotel_cost

days == raw_input("Enter number")
def rental_car_cost(days):
    rent = 40 * days
    if days >= 7:
        return rent - 50
    elif days >= 3:
        return rent - 20
    else:
        "please enter a number"
    return
print rental_car_cost

MEssages shown in console:
Type the city you're visiting. Tampaa
How many nights will you be staying for? 3
<function plane_ride_cost at 0x1857f50>
<function hotel_cost at 0x1857c08>
Enter number 3
<function rental_car_cost at 0x184f050>
None