dog.py

class Dog():
    def __init__(self, name, age):
        self.name = name
        self.age = age

    def sit(self):
        print(self.name.title() + " is now sitting")

    def roll_over(self):
        print(self.name.title() + " is now rolling over")


myDog = Dog('Yanan', 12)
myDog.sit()

再见