Half-hearted dokuwiki to kramdown converter

convert.py

import os
import re

p_heading = re.compile(r'(=+) (.*?) =+')
p_code = re.compile(r'</?code>')
p_link = re.compile(r'\[\[([^|\]]+)\|([^\]]+)\]\]')
p_inlink = re.compile(r'\[\[([^|\]]+)\]\]')

files = [x for x in os.listdir() if x.endswith('.txt')]
for x in files:
    print("Doing {}".format(x))
    text = []
    with open(x) as f:
        for line in f:  # includes newline
            # headings
            match = p_heading.match(line)
            if match:
                level = -(len(match.group(1)) - 7)
                line = '{} {}\n'.format('#' * level, match.group(2))
            # code
            match = p_code.match(line)
            if match:
                line = '~~~\n'
            text.append(line)
    text = ''.join(text)
    text = p_link.sub(r'[\2](\1)', text)
    text = p_inlink.sub(r'[\1](\1)', text)
    with open(x[:-4] + '.md', 'w') as g:
        g.write(text)