python replace regex

Question

I am trying to do a grab everything after the   lt  html gt   tag and delete it  but my code doesn t seem to be doing anything  Does  replace   not support regex  z write article replace   lt  html gt        lt  html gt

User · Answer

In order to replace text using regular expression use the re.sub function:

sub(pattern, repl, string[, count, flags])

It will replace non-everlaping instances of pattern by the text passed as string. If you need to analyze the match to extract information about specific group captures, for instance, you can pass a function to the string argument. more info here.

Examples

>>> import re
>>> re.sub(r'a', 'b', 'banana')
'bbnbnb'

>>> re.sub(r'/\d+', '/{id}', '/andre/23/abobora/43435')
'/andre/{id}/abobora/{id}'

User · Answer

For this particular case  if using re module is overkill  how about using split  or rsplit  method as   se   lt  html gt   z write article split se  0  se    For example      usr bin python  article     lt html gt Larala Ponta Monta   lt  html gt Kurimon Waff Moff     z open  out txt   w    se   lt  html gt   z write article split se  0  se    outputs out txt as   lt html gt Larala Ponta Monta   lt  html gt

User · Answer

No  Regular expressions in Python are handled by the re module  article   re sub r   is  lt  html gt        lt  html gt    article   In general  text after   re sub regex search term  regex replacement  text before

User · Answer

You can use the re module for regexes  but regexes are probably overkill for what you want   I might try something like  z write article  article index   lt  html gt      7    This is much cleaner  and should be much faster than a regex based solution

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