设计模式（组合模式，python语言实现）

[python]
# -*- coding: utf-8 -*-

#######################################################
#
# Composite.py
# Python implementation of the Class Client
# Generated by Enterprise Architect
# Created on:      12-十二月-2012 9:06:54
#
#######################################################

from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals
from future_builtins import *


class Document(object):
    """This class (a) defines behaviour for components having children, (b) stores
    child components, and (c) implements child-related operations in the Component
    inte易做图ce.
    """
    def __init__(self, name):
        super(Document,self).__init__()
        self.name=name
        pass

    def Add(self, document):
        pass

    def GetChild(self):
        pass

    def Operation(self,depth):
        # forall g in children
        #   g.Operation();


        pass

    def Remove(self, document):
        pass
    pass

class File(Document):
    """This class (a) defines behaviour for components having children, (b) stores
    child components, and (c) implements child-related operations in the Component
    inte易做图ce.
    """
    def __init__(self, name):
        super(File,self).__init__(name)
        pass

    def Add(self, document):
        pass

    def GetChild(self):
        pass

    def Operation(self,depth=1):
        # forall g in children
        #   g.Operation();

        print('-'*depth + self.name)
        pass

    def Remove(self, document):
        pass
    pass

class Folder(Document):
    """This class (a) defines behaviour for components having children, (b) stores
    child components, and (c) implements child-related operations in the Component
    inte易做图ce.     www.zzzyk.com
    """
    m_Document= Document("None")

    def __init__(self, name):
        super(Folder,self).__init__(name)
        self.ls=list()
        pass

    def Add(self, document):
        self.ls.append(document)
        pass

    def GetChild(self):
        print(self.ls)
        pass

    def Operation(self,depth=1):
        # forall g in children
        #   g.Operation();

        print('-'*depth + self.name)
        for child in self.ls:
            child.Operation(depth+2)
            pass
        pass

    def Remove(self, document):
        pass
    pass

#客户端
if __name__=="__main__":


    class Client:
        """This class manipulates objects in the composition through the Component
        inte易做图ce.

        """
        m_Document= Document("None")


        root= Folder("root")

        file1=File("file1")
        root.Add(file1)


        folder1=Folder("folder1")
        root.Add(folder1)


        folder2=Folder("folder2")

        file2=File("file2")
        folder2.Add(file2)

        folder3=Folder("folder3")
        folder2.Add(folder3)

        folder1.Add(folder2)

补充：Web开发 , Python ,