JAPANESE NOVEL TXT TO HTML

import sys
import regex as re
with open(sys.argv[1], encoding='utf8') as f:
    txt = f.read()
pattern = re.compile(r'([\p{IsHan}]+)(《[\p{IsHira}\p{IsKatakana}]+》)', re.UNICODE)
output = pattern.sub(r'<ruby>\1<rt>\2</rt></ruby>', txt).replace("｜","").replace("《","").replace("》","").replace("\n","</p><p>")
print(output)
with open('out.html', 'w') as f:
    f.write('<html><style>html {writing-mode: vertical-rl; text-orientation: upright;} body { background-color: SeaShell;}</style><body><p>'+output+'</p></body></html>')
    print('DONE!')