On Tue, 14 Jun 2016 20:28:24 -0700, Yubin Ruan wrote: > Hi everyone, > I am struggling writing a right regex that match what I want: > > Problem Description: > > Given a string like this: > > >>>string = "false_head <a>aaa</a> <a>bbb</a> false_tail \ > true_head some_text_here <a>ccc</a> <a>ddd</a> <a>eee</a> > true_tail" > > I want to match the all the text surrounded by those "<a> </a>", > but only if those "<a> </a>" locate **in some distance** behind > "true_head". That is, I expect to result to be like this: > > >>>import re result = re.findall("the_regex",string) > >>>print result > ["ccc","ddd","eee"] > > How can I write a regex to match that? > I have try to use the **positive lookbehind assertion** in python regex, > but it does not allowed variable length of lookbehind. > > Thanks in advance, > Ruan
don't try to use regex to parse html it wont work reliably i am surprised no one has mentioned beautifulsoup yet, which is probably what you require. -- What we anticipate seldom occurs; what we least expect generally happens. -- Bengamin Disraeli -- https://mail.python.org/mailman/listinfo/python-list