Scene staging environment is a simple engine for 2D games built for Python.
This is not an exhaustive game engine, it is a very simple engine aimed at 2D game development. The samples have some examples on 2D simple games built with this engine.
It is built on pygame, a "set of Python modules designed for writing video games". Pygame itself is built on SDL a cross-platform C graphics library.
Some other (more complete) game engines available for Python:
SSE is not aimed for AAA game development. If looking for such an engine and tools, one can try: Unreal engine
Unreal engine languages are Blueprints, a visual scripting language, and C++.
However Unreal engine language is not Python, but Blueprints, a visual scripting language, and C++.