simonw

With the OS X firewall enabled, you can remove the "Do you want the application "python" to accept incoming network connections?" message.

Create a self-signed certificate.

Open Keychain Access. Applications > Utilities > Keychain Access.
Keychain Access menu > Certificate Assistant > Create a Certificate...
Enter a Name like "My Certificate".
Select Identity Type: Self Signed Root
Select Certificate Type: Code Signing
Check the Let me override defaults box