celery: More precise typing for Celery.register_task(...) #168
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Resolves #167
Celery.register_task
returns the task instance that was registered, which might be a subclass ofTask
[1]. We can accurately capture this behaviour using aTypeVar
.[1] https://github.com/celery/celery/blob/3630e467361009a8b3f3050807ed16503d5c4441/celery/app/base.py#L609