Get user input for function

Question

I am trying to learn python using codeacdemy. This was one of their excercises. Basically they had me create 4 different functions that calculated the total cost. But there was no option to ask the user to manually enter in the values. So thats what I am trying to to. The code is right upto the return rental-car_cost part. its just the bottom bit where I am having trouble.

print "this code calculates the total price of a trip, using 4 functions"

def hotel_cost(nights):
    return 140*nights

def plane_ride_cost(city):
    if (city=="Charlotte"):
        return 183

    elif(city=="Tampa"):
        return 220

    elif(city=="Pittsburgh"):
        return 222

    elif(city=="Los Angeles"):
        return 475

def rental_car_cost(days):
    cost=days*40

    if (days>=7):
        cost -= 50

    elif(days>=3):
        cost -=20

    return cost

def trip_cost(city,days,spending_money):
    return rental_car_cost(days)+hotel_cost(days)+ plane_ride_cost(city)+spending_money

city= raw_input("enter city name")
days= raw_input("enter number of days staying")
spending_money= raw_input("enter spendig money")
print trip_cost(city,days, spending_money)

this was the original code and it rune perfectly fine. All i want to do is have the user enter the values when the code it running.

def hotel_cost(nights):
    return 140*nights

def plane_ride_cost(city):
    if (city=="Charlotte"):
        return 183

    elif(city=="Tampa"):
        return 220

    elif(city=="Pittsburgh"):
        return 222

    elif(city=="Los Angeles"):
        return 475

def rental_car_cost(days):
    cost=days*40

    if (days>=7):
        cost -= 50

    elif(days>=3):
        cost -=20

      return cost

def trip_cost(city,days,spending_money):
    return rental_car_cost(days)+hotel_cost(days)+ plane_ride_cost(city)+spending_money

print trip_cost("Los Angeles",5,600)

Answer 1

Equal question:

Vacation price program Python

Propose

Consider it only like some to improve this code. I think so it didn't answer your question.

I don't know what propose of Code Academy for that exercise but some way easier and cleaner is at below:

print "this code calculates the total price of a trip, using 4 functions"

def hotel_cost(nights):
    return 140 * nights

def plane_ride_cost(city):
    #So you can create dict and put for each city
    #Key - name of city
    #value - cost
    CITY_COST = {
        "Charlotte": 183,
        "Pittsburgh" : 222,
        "Los Angeles" : 475,
        "Tampa": "220"
    }
    #Method from dict 
    #if city doesn't exists it'll return False
    #The second param is default return if doesn't exist key into dict
    #you can change if do you want
    return CITY_COST.get(city, False)



def rental_car_cost(days):

    cost = days * 40

    if (days >= 7):
        cost -= 50

    elif(days >=3 ):
        cost -=20

    return cost

def trip_cost(city,days,spending_money):
    return rental_car_cost(days)+hotel_cost(days)+ plane_ride_cost(city)+spending_money

city= raw_input("enter city name")
days= raw_input("enter number of days staying")
spending_money= raw_input("enter spendig money")
print trip_cost(city,days, spending_money)

Documentation about Dict

https://docs.python.org/2/tutorial/datastructures.html#dictionaries

Answer 2

Try using int(raw_input(enter number of days staying")) or input("enter number of days staying") instead of raw_input("enter number of days staying") What happens ? You see any difference ? This is because raw_input() converts input data into string but it's not the same with input(). Find out the differences between input() and raw_input() and how it has changed as python has evolved. I have made some changes to the code as shown below. It runs perfectly without errors. Let me know if it helped you.

print "this code calculates the total price of a trip, using 4 functions"

def hotel_cost(nights):
    return 140*nights

def plane_ride_cost(city):
    if (city=="Charlotte"):
        return 183

    elif(city=="Tampa"):
        return 220

    elif(city=="Pittsburgh"):
        return 222

    elif(city=="Los Angeles"):
        return 475

def rental_car_cost(days):
    cost=days*40

    if (days>=7):
        cost -= 50

    elif(days>=3):
        cost -=20

    return cost

def trip_cost(city,days,spending_money):
    return rental_car_cost(days)+hotel_cost(days)+ plane_ride_cost(city)+spending_money

city= raw_input("enter city name")
days= int(raw_input("enter number of days staying"))  ##### notice here
spending_money= int(raw_input("enter spendig money")) ### and here too
print trip_cost(city,days, spending_money)

Instead of the above you can use the following code too.

################## without type casting#############
    city= raw_input("enter city name")
    days= input("enter number of days staying")  ##### notice something here
    spending_money= input("enter spendig money") ### and here 
    print trip_cost(city,days, spending_money)