【Python 第50课】 面向对象（4）

东东哥

class Vehicle:
    def __init__(self,speed):
        self.speed=speed

    def drive(self,distance):
        print'need %f hour(s)'%(distance/slelf.speed)
class Bike(Vehicle):
    pass

class Car(Vehicle):
    def __int__(self,speed,fuel):
        Vehicle.__init__(self,speed)
        self.fuel=fuel

    def drive(self,distance):
        Vehicle.drive(self,distance)
        print'need %f fuels' % (distance*self.fuel)

b=Bike(15.0)
c=Car(80.0,0.012)
b.drive(100.0)
c.drive(100.0)
为什么会报错
Traceback (most recent call last):
  File "C:/Users/DONG/Desktop/PY/code/47(4).py", line 20, in <module>
    c=Car(80.0,0.012)
TypeError: __init__() takes exactly 2 arguments (3 given)