python使用BeautifulSoup分析网页信息的方法

本文实例讲述了python使用BeautifulSoup分析网页信息的方法。分享给大家供大家参考。具体如下：

这段python代码查找网页上的所有链接，分析所有的span标签，并查找class包含titletext的span的内容

复制代码 代码如下:#import the library used to query a website
import urllib2

#specify the url you want to query
url = \”http://www.python.org\”

#Query the website and return the html to the variable \’page\’
page = urllib2.urlopen(url)

#import the Beautiful soup functions to parse the data returned from the website
from BeautifulSoup import BeautifulSoup

#Parse the html in the \’page\’ variable, and store it in Beautiful Soup format
soup = BeautifulSoup(page)

#to print the soup.head is the head tag and soup.head.title is the title tag
print soup.head
print soup.head.title

#to print the length of the page, use the len function
print len(page)

#create a new variable to store the data you want to find.
tags = soup.findAll(\’a\’)

#to print all the links
print tags

#to get all titles and print the contents of each title
titles = soup.findAll(\’span\’, attrs = { \’class\’ : \’titletext\’ })
for title in allTitles:
print title.contents

希望本文所述对大家的Python程序设计有所帮助。