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Articles tagged with #python
I came across Stephen Grupetta’s article that highlights a nuance that I didn’t consider. or and and don't return booleans. They return one of their operands which can be any data type. The Rules or: Returns the first operand when it's truthy Retur...
Getting the status of a celery task task_result = AsyncResult(task_id, app=celery_app) works correctly if you have a result backend configured and tasks are defined with @app.task(bind=True). The result would be STARTED; SUCCESS; FAILURE; RETRY; RE...
When NOT using Gevent (worker_pool\=[prefork|gthread]), the number of concurrent workers defaults to the number of cores which are effectively the tasks that will be executing in “parallel”. The prefetch multiplier (default 4) is an optimization to r...
Widely know as N+plus one problem, it’s actually a misnomer. As @adamj.eu’s article neatly summarize with examples (and now my dyslexic mind actually understands it), it’s one query to get a list of N objects that you iterate over. And each iteration...
…and how to get them back Alembic is SQLAlchemy's database migration framework—think change management for your relational database. It autogenerates scripts tracking your ORM model changes, letting you recreate your data model at any point in time. ...
Async Reliability with Celery Task Loss Prevention Between Web Process and Broker Enable broker confirmation: Configure confirm_publish on RabbitMQ to ensure tasks are actually committed to the broker before the delay operation completes Pass data ...
