Migrating from previous versions of APScheduler¶
From v3.0 to v3.2¶
Prior to v3.1, the scheduler inadvertently exposed the ability to fetch and manipulate jobs before
the scheduler had been started. The scheduler now requires you to call
attempting to access any of the jobs in the job stores. To ensure that no old jobs are mistakenly
executed, you can start the scheduler in paused mode (
in v3.2) to avoid any premature job processing.
From v2.x to v3.0¶
The 3.0 series is API incompatible with previous releases due to a design overhaul.
The concept of “standalone mode” is gone. For
BlockingSchedulerinstead, and for
BackgroundScheduler. BackgroundScheduler matches the old default semantics.
Job defaults (like
coalesce) must now be passed in a dictionary as the
configure(). When supplying an ini-style configuration as the first argument, they will need a corresponding
The configuration key prefix for job stores was changed from
jobstores.to match the dict-style configuration better.
max_runsoption has been dropped since the run counter could not be reliably preserved when replacing a job with another one with the same ID. To make up for this, the
end_dateoption was added to cron and interval triggers.
The old thread pool is gone, replaced by
ThreadPoolExecutor. This means that the old
threadpooloptions are no longer valid. See Configuring the scheduler on how to configure executors.
The trigger-specific scheduling methods have been removed entirely from the scheduler. Use the generic
add_job()method or the
scheduled_job()decorator instead. The signatures of these methods were changed significantly.
close_jobstoresoptions have been removed from the
shutdown()method. Executors and job stores are now always shut down on scheduler shutdown.
unschedule_func()have been replaced by
remove_job(). You can also unschedule a job by using the job handle returned from
Job store changes¶
The job store system was completely overhauled for both efficiency and forwards compatibility. Unfortunately, this means that the old data is not compatible with the new job stores. If you need to migrate existing data from APScheduler 2.x to 3.x, contact the APScheduler author.
The Shelve job store had to be dropped because it could not support the new job store design. Use SQLAlchemyJobStore with SQLite instead.
From 3.0 onwards, triggers now require a pytz timezone. This is normally provided by the scheduler,
but if you were instantiating triggers manually before, then one must be supplied as the
The only other backwards incompatible change was that
get_next_fire_time() takes two arguments
now: the previous fire time and the current datetime.
APScheduler 3.9.0 added experimental support for non-pytz timezones.
From v1.x to 2.0¶
There have been some API changes since the 1.x series. This document explains the changes made to v2.0 that are incompatible with the v1.x API.
The behavior of cron scheduling with regards to default values for omitted fields has been made more intuitive – omitted fields lower than the least significant explicitly defined field will default to their minimum values except for the week number and weekday fields
SchedulerShutdownError has been removed – jobs are now added tentatively and scheduled for real when/if the scheduler is restarted
Scheduler.is_job_active() has been removed – use
job in scheduler.get_jobs()instead
dump_jobs() is now print_jobs() and prints directly to the given file or sys.stdout if none is given
repeatparameter was removed from
interval_schedule()in favor of the universal
unschedule_func()now raises a KeyError if the given function is not scheduled
The semantics of
shutdown()have changed – the method no longer accepts a numeric argument, but two booleans
The scheduler can no longer be reconfigured while it’s running