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：
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# -*- 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()
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希望本文所述对大家的Python程序设计有所帮助。