Get the common prefix substring through Regex

Posted by Dreampuf on Stack Overflow See other posts from Stack Overflow or by Dreampuf
Published on 2012-11-03T05:25:49Z Indexed on 2012/11/03 11:01 UTC
Read the original article Hit count: 200

Filed under:

python

|

regex

like this

text = "  \t  hello there\n  \t  how are you?\n  \t HHHH"
      hello there
      how are you?
     HHHH

Could I get the common prefix substring through regex?

I try to

In [36]: re.findall(r"(?m)(?:(^[ \t]+).+[\n\r]+\1)", "  \t  hello there\n  \t  how are you?\n  \t HHHH")
Out[36]: ['  \t  ']

But apparently that common prefix substring is ' \t '
I want use for dedent function like python textwrap module.

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