綁定，反射，內建函數

標籤：_id   類型   split()   __del__   client   []   回收   刪除   continue   

#Binder 方法:綁定給誰就應該誰來調用，誰來調用就會把誰當做第一個參數自動傳入import setting #設定檔為settingclass mysql: def __init__(self,host,port): #綁定到對象 self.host=host self.port=port @classmethod #綁定到類 def from_conf(cls): return cls(setting.HOST,setting.PORT) @staticmethod #不與類也不與對象綁定 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 通過字串來操作對象或者類的屬性 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() 判斷print(hasattr(obj,‘name‘))print(hasattr(obj,‘f1‘))#getattr 調用if hasattr(obj,‘f1‘): f=getattr(obj,‘f1‘) #print(f) f()#setattr() 修改obj.x=1setattr(obj,‘x‘,2)print(obj.__dict__)#delattr 刪除#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()#內建函數isinstance() #判斷一個對象是不是某個類型的l=list([])print(isinstance(l,list))issubclass() #判斷是不是某個的子類class foo: passclass bar(foo): passprint(issubclass(bar,foo))#__str__ #列印時觸發，預設列印記憶體位址class foo: def __init__(self,name,age): #初始化時觸發 self.name=name self.age=age def __str__(self): ##列印時觸發 return <__main__,.......> #可以修改列印自己需要的conf=foo(‘abc‘,38)print(conf) #print(abc.__str__())#__del__ 回收之後在列印delclass foo: def __del__(self): print(‘del....‘)obj=foo()print(‘123‘)class foo: def __del__(self): print(‘del....‘)obj = foo()del objprint(‘123‘)

綁定，反射，內建函數