md => html table generation

import re

tag_in = lambda x, v: f'<{x}>{v}</{x}>'

def replace(matchobj):
    blocks = matchobj.groupdict()
    md_header = blocks['header']
    md_lines = blocks['lines']

    header = ''.join(tag_in('th', v) for v in md_header.split('|') if v)
    lines = ''
    for line in md_lines.strip().split('\n'):
        lines += tag_in('tr', ''.join(tag_in('td', v) for v in line.split('|')))
    return tag_in('table', tag_in('tr', header) + tag_in('tbody', lines))

def main():

    with open('md.table.txt', 'r', encoding="utf-8") as eyes:
        text = eyes.read()
    reg = r'\|{0,1}(?P<header>([ \w\d\-|_]+\|)+[ \w\d\-|_]+\|{0,1})(\r\n|\r|\n)' + \
        r'\|{0,1}((:){0,1}\--*(:){0,1}\|)+(:){0,1}\--*(:){0,1}\|{0,1}(\r\n|\r|\n)' + \
        r'(?P<lines>(\|{0,1}([ \w\d\-|_]+\|{0,1})+(\r\n|\r|\n))*)'
    r = re.search(reg, text)
    s = re.sub(reg, replace, text)
    print(s)

if __name__ == '__main__':
    main()