#绑定方法:绑定给谁就应该谁来调用，谁来调用就会把谁当做第一个参数自动传入import setting #配置文件为settingclass mysql: def __init__(self,host,port): #绑定到对象 self.host=host self.port=port @classmethod #绑定到类 def from_conf(cls): return cls(setting.HOST,setting.PORT) @staticmethod #不与类也不与对象绑定 def creat_id(): n=eroos return ncon=mysql.from_conf()print(con.port,con.host)com=mysql.creat_id()print(com.create_id)#反射 通过字符串来操作对象或者类的属性 1.hasattr 2.setattr 3.getattr 4.delattrclass foo: def __init__(self,name): self.name=name def f1(self): print('f1')obj=foo('abc')#hasattr() 判断print(hasattr(obj,'name'))print(hasattr(obj,'f1'))#getattr 调用if hasattr(obj,'f1'): f=getattr(obj,'f1') #print(f) f()#setattr() 修改obj.x=1setattr(obj,'x',2)print(obj.__dict__)#delattr 删除#del obj.namedelattr(obj,'name')print(obj.__dict__)class fprser: def __init__(self,host,port): self.host=host self.port=port self.conn='xxx' def intera(self): while True: cmd=input('>>: ').strip() if not cmd:continue cmd_l=cmd.split() print(cmd_l) if hasattr(self,cmd_l[0]): func=getattr(self,cmd_l[0]) func(cmd_l) def get(self,cmd_l): print('geting......',cmd_l) def put(self,cmd_l): print('puting...',cmd_l)client=fprser('2.2.2.2',23) client.intera()#内置函数isinstance() #判断一个对象是不是某个类型的l=list([])print(isinstance(l,list))issubclass() #判断是不是某个的子类class foo: passclass bar(foo): passprint(issubclass(bar,foo))#__str__ #打印时触发，默认打印内存地址class foo: def __init__(self,name,age): #初始化时触发 self.name=name self.age=age def __str__(self): ##打印时触发 return <__main__,.......> #可以修改打印自己需要的conf=foo('abc',38)print(conf) #print(abc.__str__())#__del__ 回收之后在打印delclass foo: def __del__(self): print('del....')obj=foo()print('123')class foo: def __del__(self): print('del....')obj = foo()del objprint('123')