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Asked: 2026-05-14T04:08:11+00:00

I have html-file. I have to replace all text between this: [%anytext%]. As I

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I have html-file. I have to replace all text between this: [%anytext%]. As I understand, it’s very easy to do with BeautifulSoup for parsing hmtl. But what is regular expression and how to remove&write back text data?

Okay, here is the sample file:

<html>
  [t1] [t2] ... [tood] ... [sadsada]
  Sample text [i8]
  [d9]
</html>

Python script must work with all strings and replace [%] -> some another string, for example:

<html>
  * * ... * ... *
  Sample text *
  *
</html>

What I did:

import re
import codecs

fullData = ''
for line in codecs.open(u'test.txt', encoding='utf-8'):
    line = re.sub("\[.*?\]", '*', line)
    fullData += line

print fullData

This code does exactly I described in sample. Thanks all.

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1 Answer

  1. Editorial Team

    Regex does the trick if you are needing to replace any text between “[%” and “%]”.

    The code would look something like this:

    import re


newstring = re.sub("\[%.*?%\]",newtext,oldstring)

    The regex used here is lazy so it would match everything between an occurrence of “[%” and the next occurrence of “%]”. You could make it greedy by removing the question mark. This would match everything between the first occurrence of of “[%” and the last occurrence of “%]”

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