Callbacks swallow exceptions

[NotAFile]

during the creation of piqueserver/piqueserver#361, I noticed that the enet callbacks swallow any exceptions in python space silently.

[aresch]

Not really sure what we can do about that. Have you considered having your callback function schedule the code in your mainloop outside of the callback?

[NotAFile]

Well, we have added a try except around it in our code. It's just a gotcha that you need that in the first place. Cython docs describe adding a try except around the code in Cython, but I have not tested if this fixes things.