2019.12.30

99.
class Dog():      # 用class创建Dog类
    """一次模拟小狗的简单尝试"""
    
    def __init__(self , name , age):   # 建立一个方法__init__()
        """初始化属性name和age"""
        self.name = name     # 形参self必不可少
        self.age = age       # 以self为前缀可以调用类中所有方法
        
    def sit(self):      # 创建方法sit
        """模拟小狗被命令时蹲下"""
        print(self.name.title() + " is now sitting.")
        
    def roll_over(self):     # 创建方法roll_over
        """模拟小狗被命令时打滚"""
        print(self.name.title() + " rolled over!") 
        
my_dog = Dog('willie' , 67)    # 创建2个实例
your_dog = Dog('lucy' , 44)

print("My dog;s name is " + my_dog.name.title() + ".")
print("My dog is " = str(my_dog.age) + " years old.")
my_dog.sit()       # 调用Dog类中方法

print("\nYour dog's name is " + your_dog.name.title() + ".")
print("Yyour dog is " + str(your_dog.age) + " years old.")
my_dog.roll_over()

来源：CSDN

作者：weixin_45707364

链接：https://blog.csdn.net/weixin_45707364/article/details/103764289