python 面向对象 类的封装

class Myclass:
    def f1(self):
        print(self.ip)
        print(self.name)
        print(self.pwd)

obj = Myclass()
obj.ip = '0.0.0.0'
obj.name = 'alex'
obj.pwd = '123'
obj.f1()
# 0.0.0.0
# alex
# 123

class Foo:
    def __init__(self,a):
        self.ip = '0.0.0.0'
        self.name = a
        self.pwd = '123'
        print(self.ip)
        print(self.name)
        print(self.pwd)
        print(a)

obj = Foo('alex')
# 0.0.0.0
# alex
# 123
# alex