继承

class Zll(object):
    def __init__(self):
        self.money=100000000
        self.house='3环里20套'

    def sing(self):
        print('唱歌')

    def dance(self):
        print('跳广场舞')

    def lm(self):
        print('找朋友')

class Zxl(Zll):
   def dance(self):
       print('跳霹雳舞')

aa=Zxl()
aa.sing()
aa.dance()



class Base(object):
    def __init__(self,host,port,password):
        self.host=host,
        self.port=port
        self.password=password
class Mysql(Base):
    pass

class Redis(Base):
    pass