Greenback

Greenback is a Python library that enables calling asynchronous code from a synchronous context within an active `asyncio` or `Trio` event loop. It bridges the gap between synchronous and asynchronous programming, allowing for gradual migration of codebases and interoperability with async-unaware libraries. The current version is 1.3.0, and it maintains a focused release cadence as a small, specialized utility built on `greenlet`.