Here (https://github.com/ets-labs/python-dependency-injector/blob/master/src/dependency_injector/providers.pyx#L90) you don't need to make an object attribute:

self.__overriding_lock = self.__class__.overriding_lock

You can simply access self.overriding_lock in your methods, since you aren't assigning to it, only calling its method.

(Sorry for the drive-by code review. Feel free to close if you don't want to change it.)