python中函数定义时必须有形参，python函数形参可以是变量吗

class Dog(): def __init__(self, name, age): """初始化属性name和age""" self.name = name self.age = age self.num = 10 def sit(self): """模拟小狗被命令时蹲下""" print(self.name.title() + " is now sitting.") def roll_over(self): """模拟小狗被命令时打滚""" print(self.name.title() + " rolled over!")my_dog = Dog('willie',香港vps6)print("My dog's name is " + my_dog.name.title() + ".")my_dog.numdef proc(Dog): return my_dog.numb= proc(my_dog)print(b)

运行结果

My dog's name is Willie.10

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