class Vehicle:
    '''
    The class blueprint for creating Vehicle objects.
    '''

    def __init__(self, make, color, tank=20):
        ''' Create a new Vehicle Object with these attributes:
            make: string representing make of the vehicle
            color: string
            tank: size of gas tank in gallons
            curr_gas: current amount of gas in tank in gallons
        '''
        self.model = make
        self.color = color
        self.tank = tank
        self.curr_gas = 0
        
        
    def add_gas(self, gallons):
        '''Add gallons to tank. Until it is full'''
        print "Adding", gallons, "to", self.curr_gas, "currently in tank."
        self.curr_gas += gallons
        if self.curr_gas > self.tank:
            print 'The gas tank is full!'
            # curr_gas cannot be more than the size of the gas tank.
            self.curr_gas = self.tank
        else:
            print 'The gas tank needs', self.tank - self.curr_gas, 'more gallons'
                
    def __str__(self):
        '''Magic method to represent a Vehicle as a string'''
        return "Make: " + self.model + ", Color: " + self.color  + \
                ", Tank Capacity: " + str(self.tank) + ", Current Gas: " + \
                str(self.curr_gas)
        #return 'Gas remaining: ' + str(self.gas)

if __name__ == '__main__':
     my_car = Vehicle('Honda', 'White')
     your_motorcycle = Vehicle('Mazda', 'Red', 5)
     truck = Vehicle('Mercedes', 'Black', 30)
          
     print "my_car:", my_car
     print "your_motor_cycle:", your_motorcycle
     print "truck:", truck
     print

     print "**Adding 15 gallons to my_car"
     my_car.add_gas(15)
     print "**Adding 30 gallons to your_motorcycle"
     your_motorcycle.add_gas(30)
     
     print
     print "my_car:", my_car
     print "your_motor_cycle:", your_motorcycle
     print "truck:", truck