How to establish IPv6 connections in websocket？

Here is an example.

if __name__ == "__main__":
    factory = websocket.WebSocketServerFactory(u"wss://{WS_BIND_IP}:{WS_PORT}")
    factory.protocol = ServerProtocol
    listenWS(factory)
    reactor.run()

WS_BIND_IP is my ipv6 address and WS_PORT is 11111 for example. Then use wscat to test websocket.

wscat ws://127.0.0.1:11111 return Connected.
wscat ws://my_ipv4_address:11111 return Connected.
wscat ws://[::]:11111 return error: connect ECONNREFUSED :::11111
wscat ws://[my_ipv6_address]:11111 return error: connect ECONNREFUSED my_ipv6_address:11111

Start by reproducing the Python WebSocket server example with the IPv6 bind address, then compare its behavior with the working IPv4 cases using the shown wscat commands. Done means the cause of the IPv6 connection refusal is identified and the issue includes a verified way to establish an IPv6 WebSocket connection.