trip calculator

#improvements are better. This will be on pastebin.

#this is a mini-program for calculating distance, time it takes to get to a place and how fast a car was traveling given a certain distance and time it took to get there.

#A library that contains the functions and classes uaed here
import vehiclelib

option = 0
mph = 0
time = 0
distance = 0

#loop with a sintanel value given as the letter q to stop the program
while option != 'q':
    print('type q to quit the program.')
    try:
        option = input(' 1. find the speed of a vehicle.\n 2. find the distance a vehicle traveled.\n 3. find the time it will take to get some distance \n')
    #if option is 1 prompt for distance and time then call calcSpeed to get the speed of the object
        if option == '1':
            distance = float(input('enter the distance: '))
            time = float(input('enter the time it would or did take to get there in hours: '))
            mph = int(vehiclelib.calcSpeed(distance, time))
    #give result to user
            print('your speed is: '+str(mph)+ 'mph \n')
    #if option 2 prompt for speed of the object and the time the object has been traveling for
        elif option == '2':
            speed = float(input('enter the speed: '))
            time = float(input('enter the time it took or takes to get there: '))
    #call calcDistance function ans return the result
            distance = int(vehiclelib.calcDistance(speed, time))
    #output distance traveled
            print('the distance you could have traveled in that time is: ' +        str(distance) +' miles\n')
    #option three will take input as a floating point value and calculate the time ot takes to travel some place
        elif option == '3':
            distance = float(input('enter a distance you are going to or already have traveled: '))
            speed = float(input('enter the speed of the vehicle here: '))
            #call calcTime to calculate t = distance/speed return result
            time = int(vehiclelib.calcTime(distance, speed))
            print('The time it would have taken to get there is: ' + str(time) +' hours \n')
            break
    except ValueError:
                print('only type a number!')