Python Regex Mark-Up

Question

Hi guys having trouble with a particular problem. I am using python's regex to alter the markup source to output html format.

markup source:

[ 
# sometextsometextsometextsometextsometextsometext.  #

# sometextsometextsometextsometextsometextsometextsometextsometext
sometextsometextsometextsometextsometextsometext. #
]


[
hello i am a normal paragraph.
]

desired output:

<ol> 
<li> sometextsometextsometextsometextsometextsometext.  </li>

<li> sometextsometextsometextsometextsometextsometextsometextsometext
sometextsometextsometextsometextsometextsometext. </li>
</ol>

<p>
hello i am a normal paragraph.
</p>

How is the code supposed to know whether to put the text in a list or a paragraph? — Nolen Royalty
– Nolen Royalty, Commented May 8, 2013 at 0:51
The presence of a '#' within the square brackets.. i guess, not entirely sure. — user2360404
– user2360404, Commented May 8, 2013 at 0:57
So what exactly is your problem, and what solutions have you tried? — jwodder
– jwodder, Commented May 8, 2013 at 1:00
I need to distinguish between a [text] and a [#list#] sub(r'\#(.*?)\#', '<li>\g<1></li>', data) partially works (works for the first line of sometext, not the second. — user2360404
– user2360404, Commented May 8, 2013 at 1:23

HennyH · Accepted Answer · 2013-05-08 01:24:38Z

import re
with open('mk.txt') as f:
    with open('newmk.txt','w+') as g:
        text = f.read()
        SquareGroups = re.findall(r'\[(?:.|\n)+?\]',text)
        for group in SquareGroups:
            if '#' in group: #must be ol
                group = group.replace('[','<ol>')
                group = group.replace(']','</ol>')
                group = re.sub('#(?= ?\w)','<li>',group)
                group = re.sub('(?<=[\w ])#','</li>',group)
            else:
                group = group.replace('[','<p>')
                group = group.replace(']','</p>')
            g.write(group)
            g.write('\n') #optional, just makes the output look 'nicer'

Transforms your input in mk.txt into the following text in newmk.txt:

<ol>
<li> sometextsometextsometextsometextsometextsometext.  </li>

<li> sometextsometextsometextsometextsometextsometextsometextsometext
sometextsometextsometextsometextsometextsometext. </li>
</ol>
<p>
hello i am a normal paragraph.
</p>

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