Threadloop: Tornado IOLoop Backed Concurrent Futures

Threadloop is a Python library that enables running Tornado coroutines from synchronous Python code by leveraging a thread pool, backed by Tornado's IOLoop. It provides a `ThreadLoopExecutor` that mimics the `concurrent.futures.ThreadPoolExecutor` API. The library is currently at version 1.0.2 and was last updated in 2016, indicating it is no longer actively maintained but generally functional.