python子类属性方法案例，无法运行

刘翰

class Car():
    """一次模拟汽车的简单尝试"""

    def _init_(self,make,model,year):
        self.make=make
        self.model=model
        self.year=year
        self.odometer_reading=0

    def get_descriptive_name(self):
        long_name=str(self.year)+' '+self.make+' '+self.model
        return long_name.title()

    def read_odometer(self):
        print("This car has"+str(self.odometer_reading)+"miles on it.")

    def update_odometer(self,mileage):
        if mileage>=self.odometer_reading:
            self.odometer_reading=mileage
        else:
            print("You can't roll back an odometer!")

    def increment_odometer(self,miles):
        self.odometer_reading+=miles


class ElectricCar(Car):
    """Represent aspects of a car,specific to electric vehicles."""
    def _init_(self,make,model,year):
        """电动汽车的独特之处
        初始化父类的属性，再初始化电动汽车特有的属性
        """
        super()._init_(make,model,year)
        

my_tesla=ElectricCar('tesla','model s',2016)
print(my_tesla.get_descriptive_name())

   

===================== RESTART: C:/python3.7/case9.3.3.py =====================
Traceback (most recent call last):
  File "C:/python3.7/case9.3.3.py", line 36, in <module>
    my_tesla=ElectricCar('tesla','model s',2016)
TypeError: ElectricCar() takes no arguments

BngThea

init左右两边是两个下划线
__init__