pyraknet is a Python extension that has bindings for the reliable UDP network library RakNet.
pyraknet allows you to concentrate on your game or application rather then writing a your own networking code. It is straightforward to implement and you only need a small amount of UDP networking knowledge.
Easy to implement
Low bandwidth overhead
Automatic peer management. Each client is assigned an identifier.
Optonally specify packets to be reliable – packets will automatically resend themselves if dropped.
Optonally specify packets to arrive in the right order, or to be discarded if it receives an old packet.