Python继承

#coding:utf8
class Car(object):
   '''
   模拟汽车的简单尝试
   '''
   def __init__(self, make, model, year):
      '''
      初始化汽车的属性
      :param make:
      :param model:
      :param year:
      '''
      self.make = make
      self.model = model
      self.year = year
      self.odometer_reading = 0

   def update_odomerer(self,mileage):
      '''
      将里程表设置为指定的值
      :param mileage:
      :return:
      '''
      self.odometer_reading = mileage

   def get_descriptive_name(self):
      '''
      返回整洁的描述信息
      :return:
      '''
      long_name = str(self.year) + ' ' + self.make + ' ' + self.model
      return long_name.title()

   def read_odometer(self):
      '''
      打印一条指出汽车里程的信息
      :return:
      '''
      print 'this car has ' + str(self.odometer_reading) + ' miles on it'


class ElectricCar(Car):
   '''电动车的独特之处'''

   def __init__(self, a, b, c):
      '''初始化父类的属性'''
      super(ElectricCar, self).__init__(a, b, c)
my_tesla = ElectricCar('tesla', 'model s', 1)
print my_tesla.get_descriptive_name()