I'm trying to replace the default Python.tmlanguage with my hand-curated version of it but I can't seem to find it, hints anyone?
In ST3, all packages have been moved into renamed zip files, something like .sublime-package. In OS X, they're inside the app bundle. I don't know anything about Windows locations.
Awesome, thanks, just unziped that file, added my tmlanguage file, re-zipped it and everything is working as expected!
You should probably ignore the default "Python" package, and then use your custom one. By simply rezipping it, it may be overridden in future updates. Of course, you could always repeat the same steps you did this time if you want instead.