Python实现的RSS阅读器实例

本文实例讲述了Python实现的RSS阅读器。分享给大家供大家参考。具体如下：

    # -*- coding:utf-8 -*-
    # file: pyRSS.py
    #
    import Tkinter
    import urllib
    import xml.parsers.expat
    class MyXML: # XML解析类
      def __init__(self, edit):
        self.parser = xml.parsers.expat.ParserCreate() # 生成XMLParser
        self.parser.StartElementHandler = self.start # 起始标记处理方法
        self.parser.EndElementHandler = self.end # 结束标记处理方法
        self.parser.CharacterDataHandler = self.data # 字符数据处理方法
        self.title = False # 状态标志
        self.description = False
        self.date = False
        self.edit = edit # 多行文本框对象
      def start(self, name, attrs): # 起始标记处理方法
        if name == 'title': # 判断是否为title元素
          self.title = True # 标志设为真
        elif name == 'description':
          self.description = True
        elif name == 'pubDate': # 判断是否为pubDate
          self.date = True # 标志设为真
        else:
          pass
      def end(self, name): # 结束标记处理
        if name == 'title':
          self.title = False # 标志设为假
        elif name == 'description':
          self.description = False
        elif name == 'pubDate':
          self.date = False # 标志设为假
        else:
          pass
      def data(self,data): # 字符数据处理方法
        if self.title: # 根据标志状态输出数据
          self.edit.insert(Tkinter.END,
              '******************************\n')
          self.edit.insert(Tkinter.END, 'Title: ')
          self.edit.insert(Tkinter.END, data + '\n')
        elif self.description:
          self.edit.insert(Tkinter.END, 'Date: ')
          self.edit.insert(Tkinter.END, data + '\n')
        elif self.date:
          self.edit.insert(Tkinter.END, 'Date: ')
          self.edit.insert(Tkinter.END, data + '\n')
        else:
          pass
      def feed(self, data):
        self.parser.Parse(data, 0)
    class Window:
      def __init__(self, root):
        self.root = root # 创建组件
        self.entryUrl = Tkinter.Entry(root,width = 30)
        self.entryUrl.place(x = 65, y = 15)
        self.get = Tkinter.Button(root,
            text = '读取RSS', command = self.Get, font = ('system','10'))
        self.get.place(x = 350, y = 15)
        self.frame = Tkinter.Frame(root, bd=2)
        self.scrollbar = Tkinter.Scrollbar(self.frame)
        self.edit = Tkinter.Text(self.frame,yscrollcommand = self.scrollbar.set,
            width = 96, height = 32)
        self.scrollbar.config(command=self.edit.yview)
        self.edit.pack(side = Tkinter.LEFT)
        self.scrollbar.pack(side=Tkinter.RIGHT, fill=Tkinter.Y)
        self.frame.place(y = 50)
      def Get(self):
        url = self.entryUrl.get()
        page = urllib.urlopen(url) # 打开URL
        data = page.read() # 读取URL内容
        parser = MyXML(self.edit) # 生成实例对象
        parser.feed(data) # 处理XML数据
        page.close()
    root = Tkinter.Tk()
    root.title('RSS 阅读器')
    window = Window(root)
    root.minsize(700,500)
    root.maxsize(700,500)
    root.mainloop()

希望本文所述对大家的Python程序设计有所帮助。