code: def prepend(line, path):
      
      if isinstance(line, str):
          line = line.encode('utf-8')
      if not line.endswith(b'\n'):
          line += b'\n'
      temp = tempfile.NamedTemporaryFile('wb')
      temp_name = temp.name # We really only need a random path-safe name
      temp.close()
      with open(temp_name, 'wb') as temp:
          temp.write(line)
          with open(path, 'rb') as r:
              temp.write(r.read())
      # Now replace the original with the modified version
      shutil.move(temp_name, path)
docs: Appends *line* to the _beginning_ of the file at the given *path*.
  
      If *line* doesn't end in a newline one will be appended to the end of it.