I'm not quite sure what you mean by "do not know how to check if the deprecation warning are enabled". Do you mean how do you make sure you don't emit a DeprecationWarning if someone hasn't turned warnings on? If that's the case then if you look at some example code and read https://docs.python.org/3/c-api/exceptions.html#issuing-warnings you will notice that when you call the warning-related functions, all you have to do is check if the return value is < 0, then return like there is an exception raised. Otherwise the warnings module handles whether something will be shown.