Debugging Python's Asyncio
Debugging asyncio is about finding what's blocking the single-threaded event loop. Use its debug mode to detect slow callbacks and `run_in_executor` to offload CPU-bound work. The biggest mistake is calling blocking code directly, which stalls the entire app.
Debugging asyncio is about finding what's blocking its single-threaded event loop. Think of it as a single-lane highway: one stalled car (a blocking call) freezes all other concurrent tasks. Enable debug mode (`debug=True`) to log slow operations and detect calls from wrong threads. To run blocking code without stalling the loop, use `loop.run_in_executor()` to push the work to a separate thread or process. The most common error is calling blocking functions directly within an async function, which negates the benefits of concurrency.
Read the original → docs.python.org
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