Use Inheritance to add more features to a class
class Car :
def __init__(self) :
self.color = "black"
self.number_of_tires = 4
self.miles_per_gallon = 20
def __str__(self) :
return "Car { Color: "+self.color+" Tires: "+str(self.number_of_tires) \
+" MPG: " + str(self.miles_per_gallon) + " }"
def set_color( self, clr ) :
self.color = clr
def get_color( self ) :
return self.color
def set_number_of_tires( self, nt ) :
self.number_of_tires = nt
def get_number_of_tires( self ) :
return self.number_of_tires
def set_miles_per_gallon( self, mpg ) :
self.miles_per_gallon = mpg
def get_miles_per_gallon( self ) :
return self.miles_per_gallon
class Hybrid(Car) : #1
def __init__(self) :
Car.__init__(self) #2
self.battery_life = 20
def __str__(self) :
s = Car.__str__(self) #3
s = s + " Battery Life: " + str(self.battery_life)
return s
def set_battery_life(self, bl ) :
self.battery_life = bl
def get_battery_life(self) :
return self.battery_life
c = Car()
h = Hybrid()
print h
c = Car()
h = Hybrid()
print c
print h
class ThreeWheelCar(Car) :
def __init__(self) :
Car.__init__(self)
self.number_of_tires = 3
c = Car()
t = ThreeWheelCar()
print c
print t
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