html-contents.py

title = '~'
elements = ''

while True:
    line = input()
    if line == 'exit':
        break

    tag, content = line.split(' ')

    element = f'\t<{tag}>{content}</{tag}>\n'

    if tag == 'title':
        title = content
    else:
        elements += element

title = '' if title == '~' else f' \t<title>{title}</title>\n'

with open('index.html', 'w') as w_file:
    w_file.write(
        f"""<!DOCTYPE html>
 <html>
 <head>
 {title}</head>
 <body>
 {elements}</body>
 </html>""")