Celery seems too heavy for doing causal scheduling like calling APIs every hour and doing some database based calculation.<p>How promising "Advanced Python Scheduler" is, have you used it?<p>Are there any good libraries available for Python + Flask?
There's a pythonic scheduler here - <a href="https://github.com/dbader/schedule" rel="nofollow">https://github.com/dbader/schedule</a><p>you could also use cron