`threading.local` ✍ 💲 🌟 ⏮️ 🧵, ✋️ 🔁 🛠️ 🔜 🏃 🌐 📟 (✅ 🔠 📨) 🎏 🧵, & 🎲 🚫 ✔.

🔛 🔝 👈, 🔁 🛠️ 💪 🏃 🔁 📟 🧵 (⚙️ `asyncio.run_in_executor`), ✋️ 🔗 🎏 📨.

`threading.local` creates a value exclusive to the current thread, but an async framework would run all the code (e.g. for each request) in the same thread, and possibly not in order.

On top of that, an async framework could run some sync code in a threadpool (using `asyncio.run_in_executor`), but belonging to the same request.