parameters: ()
return_statement: return os.path.exists(ipv6_file)
docstring: @name 是否监听ipv6
          @author hwliang<2021-08-12>
          @return bool
function: def listen_ipv6():
      '''
          @name 是否监听ipv6
          @author hwliang<2021-08-12>
          @return bool
      '''
      ipv6_file = '{}/data/ipv6.pl'.format(get_panel_path())
      return os.path.exists(ipv6_file)
function_tokens: def listen_ipv6 ( ) : ipv6_file = '{}/data/ipv6.pl' . format ( get_panel_path ( ) ) return os . path . exists ( ipv6_file )