Python: an implementation of the decoration Mode

#  ! /Usr/bin/ENV Python  #  -*-Coding: UTF-8 -*-  Import  Syssys. Path. append (  "  ..  "  )  Import  Common  Class  Component:  Def   _ Init __ (Self, data): Self. url = Data [ "  URL  "  ] Self. noteid = Data [ "  Noteid  "  ] Self. userid = Data [ "  Userid  "  ] Self. folderid = Data [ "  Folderid "  ]  Def  Execute (Self ):  Pass  Class  Notecomponent (Component ):  Def   _ Init __ (Self, Data, Component = None): Self. Component = Component component.  _ Init __  (Self, data)  Def Setcomponent (self, component): Self. Component = Component  Class  Htmlcatcher (notecomponent ):  Def  Execute (Self ):  If Self. Component! = None: self.component.exe cute ()  Print Self. _ Class __ . _ Name __  Class  Imagecatcher (notecomponent ): Def  Execute (Self ):  If Self. Component! = None: self.component.exe cute ()  Print Self. _ Class __ . _ Name __      Class  Sharenotecomponet (notecomponent ):  Def  Execute (Self ):  If Self. Component! = None: self.component.exe cute () Print Self. _ Class __ . _ Name __      Def  Process (Message): Component = None  If Message [ '  Type  ' ] & Common. catch_page: Component = Htmlcatcher (Message [ "  Data  " ])  If Message [ '  Type  ' ] & Common. catch_image: component1 = Imagecatcher (Message [ "  Data  "  ]) Component1.setcomponent (Component) Component = Component1  If Message [ '  Type ' ] & Common. save_shared: component1 = Sharenotecomponet (Message [ "  Data  "  ]) Component1.setcomponent (Component) Component = Component1 component.exe cute ()  If   _ Name __ = "  _ Main __  "  : Message ={  #  "Type": Common. catch_page,              #  "Type": Common. catch_image | common. save_shared,              "  Type  " : Common. catch_page | common. save_shared | Common. catch_image,  "  Data  "  :{  "  URL " : "  Http://www.baidu.com  "  ,  "  Noteid  " 100 ,  "  Userid  " 100 ,  "  Folderid  " 100 ,} Process (Message)