asyncio is an asynchronous I/O framework shipping with the Python Standard Library. In this blog post, we introduce uvloop: a full, drop-in replacement for the asyncio event loop. uvloop is written in Cython and built on top of libuv.
uvloop makes asyncio fast. In fact, it is at least 2x faster than nodejs, gevent, as well as any other Python asynchronous framework. The performance of uvloop-based asyncio is close to that of Go programs."
The question asked was if there is "anything [similar in] python", so there's an obvious requirement of being able to use it from python. That leaves either something with a bit of a friendly python wrapper, or just calling out directly to (only) pure C/C++ code. The latter might be even faster, but at that point it's questionable if calling it from python really is worth the trouble at all.
So, I think it's fair to say that "uvloop may be 'something [similar in]' python".