code: def comment_out_line(filename, line, comment='#'):
      '''Comment line out by putting a comment sign in front of the line.
  
      If the file does not contain the line, the files content will not be
      changed (but the file will be touched in every case).
      '''
      return comment_out_local(filename, line, comment,
                               update_or_append_line=update_or_append_linef comment_out_line(filename, line, comment='#'):
      '''Comment line out by putting a comment sign in front of the line.
  
      If the file does not contain the line, the files content will not be
      changed (but the file will be touched in every case).
      '''
      return comment_out_local(filename, line, comment,
                               update_or_append_line=update_or_append_line)
docs: Comment line out by putting a comment sign in front of the line.
  
      If the file does not contain the line, the files content will not be
      changed (but the file will be touched in every case).