Tag: asyncio

5 articles

Fix: aiosqlite Not Working — Single Writer, WAL Mode, Row Factory, and Connection Patterns

May 20, 2026

How to fix Python aiosqlite errors — database is locked, WAL mode for concurrent reads, foreign_keys PRAGMA, row factory for dict-like rows, connection per request vs pool, datetime detect_types, and FastAPI integration.

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Fix: arq Not Working — Worker Not Picking Jobs, WorkerSettings, Cron, Retries, and Result Expiry

May 18, 2026

How to fix Python arq errors — worker can't find tasks, WorkerSettings class structure, cron syntax differences, msgpack serialization errors, job_id deduplication, result expiration, and Redis connection pooling.

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Fix: Python asyncio.gather Not Handling Errors — Exceptions Swallowed or All Tasks Cancelled

Mar 22, 2026

How to fix asyncio.gather error handling — return_exceptions parameter, partial failures, task cancellation propagation, TaskGroup alternatives, and exception isolation patterns.

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Fix: Python asyncio Blocking the Event Loop — Mixing Sync and Async Code

Mar 21, 2026

How to fix Python asyncio event loop blocking — using run_in_executor for sync calls, asyncio.to_thread, avoiding blocking I/O in coroutines, and detecting event loop stalls.

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Fix: Python asyncio Not Running / async Functions Not Executing

Mar 13, 2026

How to fix Python asyncio not running — coroutines never executing, RuntimeError no running event loop, mixing sync and async code, and common async/await mistakes in Python.

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