urllib 
urllib2 
Beautiful Soup 
http://www.crummy.com/software/BeautifulSoup/ 
lxml 
http://lxml.de 
HTQL 
http://htql.net/ 
Scrapy 
http://scrapy.org/ 
Mechanize 
http://wwwsearch.sourceforge.net/mechanize/ 
PyQuery 
http://pythonhosted.org/pyquery/index.html 
requests 
http://docs.python-requests.org/en/latest/ 
selenium 
http://selenium-python.readthedocs.org/en/latest/ 

补上 
httplib 
httplib2 
再补充一个 
Ghost.py 
https://github.com/jeanphix/Ghost.py 

再加上一个多线程或多进程+队列 
代理访问。

Python开发爬虫常用库