【脚本语言系列】关于Python文本解析HTML,你需要知道的事

如何使用HTMLParser

• 获取页面图片地址(www.baidu.com)

# -*- coding:utf-8 -*-#import Tkinterimport urllibimport HTMLParserclass MyHTMLParser(HTMLParser.HTMLParser):    def __init__(self):        HTMLParser.HTMLParser.__init__(self)        self.gifs = []        self.jpgs = []    def handle_starttag(self, tags, attrs):        if tags == "img":            for attr in attrs:                for t in attr:                    if "gif" in t:                        self.gifs.append(t)                    elif "jpg" in t:                        self.jpgs.append(t)                    elif "jpeg" in t:                        self.jpgs.append(t)                    else:                        pass    def get_gifs(self):        return self.gifs    def get_jpgs(self):        return self.jpgsclass Window:    def __init__(self, root):        self.root = root        self.label = Tkinter.Label(root, text = "Input URL:")        self.label.place(x = 5, y = 15)        self.entryUrl = Tkinter.Entry(root, width = 30)        self.entryUrl.place(x = 65, y = 15)        self.get = Tkinter.Button(root, text = 'Get Picture', command = self.Get)        self.get.place(x = 280, y = 15)        self.edit = Tkinter.Text(root, width = 470, height = 600)        self.edit.place(y = 50)    def Get(self):        url = self.entryUrl.get()        page = urllib.urlopen(url)        data = page.read()        parser = MyHTMLParser()        # print data        parser.feed(data)        self.edit.insert(Tkinter.END, "====GIF====\n")        gifs = parser.get_gifs()        for gif in gifs:            self.edit.insert(Tkinter.END, gif + '\n')        self.edit.insert(Tkinter.END, "===========\n")        self.edit.insert(Tkinter.END, "====JPG====\n")        jpgs = parser.get_jpgs()        for jpg in jpgs:            self.edit.insert(Tkinter.END, jpg + '\n')        self.edit.insert(Tkinter.END, "===========\n")        page.close()root = Tkinter.Tk()window = Window(root)root.minsize(600, 480)root.maxsize(600, 480)root.mainloop()

1. 用户界面

2. 界面输出

什么是HTMLParser

在Python中可以使用HTMLParser模块处理HTML, 获取页面中感兴趣的内容。
HTMLParser模块提供了对HTML标记处理的方法。