Writing a web crawler in Python (ii): Using URLLIB2 to crawl Web content through specified URLs

The so-called web crawl, is the URL address specified in the network resources from the network stream to read out, save to the local.

Similar to using the program to simulate the function of IE browser, the URL is sent as the content of the HTTP request to the server side, and then read the server-side response resources.

In Python, we use the URLLIB2 component to crawl a Web page.

URLLIB2 is a Python component that gets the URLs (uniform Resource Locators).

It provides a very simple interface in the form of a urlopen function.

The simplest URLLIB2 application code requires only four lines.

We create a new file urllib2_test01.py to feel the role of URLLIB2:

Import urllib2  
response = Urllib2.urlopen (' http://www.baidu.com/')  
html = response.read ()  
Print HTML

Press F5 to see the results of the run: