Coordinating Asyncio Tasks with Locks and Events

asyncio sync primitives are traffic signals for coroutines, preventing collisions over shared state. Use a Lock for exclusive access or an Event to signal multiple tasks to proceed. Footgun: these are for asyncio tasks only, not OS threads.
asyncio synchronization primitives are traffic signals for your coroutines, preventing them from colliding when accessing shared data. Use a Lock to grant exclusive access, like a key to a room. Use an Event to notify multiple tasks to proceed, like a starting pistol. The main footgun is using these for OS threads; they are not thread-safe and are designed only for coordinating asyncio tasks.
Read the original → docs.python.org
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