Method to extract hyperlinks from web pages in Python

The simplest implementation method is to first capture the target web page, and then obtain hyperlinks by matching the href attribute of a tags through regular expressions.

The code is as follows:

import urllib2
import re
url = 'http://www.sunbloger.com/'
req = urllib2.Request(url)
con = urllib2.urlopen(req)
doc = con.read()
con.close()
links = re.findall(r'href\=\"(http\:\/\/[a-zA-Z0-9\.\/]+)\"', doc)
for a in links:
  print a

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