code: def connection_check(addr, port=80, safe=False, ipv6=None):
      '''
      Provides a convenient alias for the dns_check filter.
      '''
      return dns_check(addr, port, safe, ipv6f connection_check(addr, port=80, safe=False, ipv6=None):
      '''
      Provides a convenient alias for the dns_check filter.
      '''
      return dns_check(addr, port, safe, ipv6)
docs: Provides a convenient alias for the dns_check filter.