url=HTTP://http://licai.cofool.com/ask/qa_447157.html 

When I was in crawl comment tag class is changeful, respectively class_data=https://bbs.csdn.net/topics/[" c3 answer - the user - type ", "c 33 answer - the user - type", "c333 answer - the user - type", "c3333 answer - the user - type", "c33333 answer - the user - type", "c333333 answer - the user - type"] a total of six, I really want to write a regular expression all the content in the tag, the feasibility of this way, in accordance with the method of online a great god I tried didn't work, what a great god help to look at the specific positioning method,