tags: #python #network
PythonSocket[s] EchoServer[e] MultiThreadedTcpServer[m] ClipboardServer[c]
AsyncUdpReceive[u] PingExample1

## Constants
The `socket.getaddrinfo()` function has an optional parameter, `family`, that defaults to `0`.
Constants `socket.AF_INET` and `socket.AF_INET6` have type `socket.AddressFamily`, whereas
`0` has type `int`. If you require something of type `socket.AddressFamily` corresponding to
`0`, use `socket.AF_UNSPEC`.