"Python learning Notes" Using Python to crawl Baidu search results __python

The first is the library you need:

URLLIB,URLLIB2-----Build Access Requests

SYS-----Python standard library

BeautifulSoup-----Parse Crawl Results

first, build access requests

In Python, Urllib.urlencode can convert a key-value pair such as key-value into a format such as a=1&b=2, such as:

From urllib import urlencode
data = {' IE ': ' utf-8 ', ' word ': ' Test '}
print data
print UrlEncode (data)

Baidu search keyword for Chinese, the transfer of Chinese parameters to the URL needs to go through transcoding, UrlEncode can be transferred to the Chinese code

QUOTE () in the Urllib library can also be implemented to translate the Chinese code

Sys.stdin.encoding can query the current Environment encoding form (PS: ' cp936 ' is actually GBK)

Finally, we can write the URL of the search page and use the Urllib2.urlopen (URL). read () to get the content of the Web page.

Import sys
import urllib
import urllib2
question_word = "Programmer"
data = {' WD ': Question_word, ' ie ': ' utf-8 '
data = urllib.urlencode (data)
URL = "http://www.baidu.com/s?wd=" + '? ' +data

HtmlPage = Urllib2.urlopen (URL)

second, get search results link

outfile = open (' Csv_test.txt ', ' ab+ ')

str = html.read ()
str = beautifulsoup (str)
div = str (' div ') for the members in
div:
       
    If Members.get (' class '):
        if "result" in Members.get (' class '):
            pages = Members (' a ')
            for page in pages:
                herf = page.get (' href ', No NE)
                if herf!= None:
                    temp = Requests.get (Herf.rstrip ())
                    print Temp.url
                    outfile.write (Temp.url)
                    outfile.write (' \ n ')
                    

Baidu page to see the source code, you can see the information we want in <div class= "Result...><a herf=" ... "></a>...</div>, So as long as you find the source code contains this part of the information, and finally crawled to the page link saved to TXT file.