Panda3D Online Play?

A link or download would be great. Other than that the only post I found about the topic is this:
[Asyncore UDP Networking Made Easy!)

But I copy and pasted them into my game, and it did nothing but freeze panda3d.

If someone could help me fix-to-fit the code on the link, much would be appreciated!
I don’t see anything wrong with it.
(I don’t get any errors either, just freezes panda3d until it asks to close).