Python 类

class Person:
    def set_name(self,name):
        self.name=name
    def get_name(self):
        return self.name
    def greet(self):
        print("Hello,world!I am {}.".format(self.name))

class MemberCounter:
    members=0
    def init(self):
        MemberCounter.members +=1

class Filter:
    def init(self):
        self.blocked=[]
    #     过滤器
    def filter(self,sequence):
        # 迭代＋判断
        return [x for x in sequence if x not in self.blocked]
class SPAMFilter(Filter): #SPAMFilter是Filter的子类
    def init(self):#重写init方法
        self.blocked=['SPAM']

class Calculator:
    def calculator(self,expression):
        self.value=eval(expression)
class Talker:
    def talk(self):
        print('Hi , my value is',self.value)
class TalkingCalculator(Calculator,Talker):
    pass

from abc import ABC,abstractmethod
class Talker(ABC):
    @abstractmethod
    def talk(self):
        pass
class Knigget(Talker):
    def talk(self):
        print("Ni!")

from abc import ABC,abstractmethod
class Talker(ABC):
    @abstractmethod
    def talk(self):
        pass
class Knigget(Talker):
    def talk(self):
        print("Ni!")
class Herring:
    def talk(self):
        print("Blub.")
class Clam:
    pass