combining captures in regex

som开发者_如何学编程e text I want to capture. <tag> junk I don't care about</tag> more stuff I want.

Is there a easy way to write a regex that captures the first and third sentences in one capture?

You could also consider stripping out the unwanted data and then capturing.

data = "some text to capture. <tag>junk</tag> other stuff to capture".
data = re.replace('<tag>[^<]*</tag>', data, "")
data_match = re.match('[\w\. ]+', data)

Not to my knowledge. Usually that's why regex search-and-replace functions allow you to refer to multiple capturing groups in the first place.

Unfortunately No, its not possible. The solution is to capture into two seperate captures and then contactenate after the fact.

According to this older thread on this site:

Regular expression to skip character in capture group

A group capture is consecutive so you cant. You can do it in one parse with regex like below and join the line in code

^(?<line1>.*?)(?:\<\w*\>.*?\</\w*\>)(?<line3>.*?)$

here's a non regex way, split on </tag>, go through the array items, find <tag>, then split on <tag> and get first element. eg

>>> s="some text I want to capture. <tag> junk I don't care about</tag> more stuff I want. <tag> don't care </tag> i care"
>>> for item in s.split("</tag>"):
...     if "<tag>" in item:
...        print item.split("<tag>")[0]
...     else:
...        print item
...
some text I want to capture.
 more stuff I want.
 i care

Use the split() function of asp.net to do the same.