Python APScheduler fails: 'Only timezones from the pytz library are supported' error

Question

I am trying to run a python async app with an asyncioscheduler scheduled job but the APScheduler fails during build because of this error:

'Only timezones from the pytz library are supported' error

I do include pytz in my app and i am passing the timezone. What is causing the error?

I am calling the asyncioscheduler in a class where i create job manager:

from apscheduler.schedulers.asyncio import AsyncIOScheduler


class ScheduleManager:
    def __init__(self) -> None:
    self.scheduler = AsyncIOScheduler()
    
    def start(self):
    self.scheduler.start()

    def stop(self):
    self.scheduler.shutdown()
    
    def add_seconds_interval_job(self, callback, interval : int):
    self.scheduler.add_job(callback, 'interval', seconds = interval)
    
    def add_minutes_interval_job(self, callback, interval : int):
    self.scheduler.add_job(callback, 'interval', minutes = interval)

    def add_hours_interval_job(self, callback, interval : int):
    self.scheduler.add_job(callback, 'interval', hours = interval)

    def add_days_interval_job(self, callback, interval : int):
    self.scheduler.add_job(callback, 'interval', days = interval)

then i call this manager from my application like :

from jobs import ScheduleManager, ConfigJob

class AppInitializer:

    def __init__(self) -> None:
    self.schedule_manager = ScheduleManager()
    self.config__job = ConfigJob()

    async def initialize(self, app, loop):
    self.schedule_manager.add_seconds_interval_job(self.config_job.run, 5)
    self.schedule_manager.start()

Answer 1

The tzlocal library switched from pytz to zoneinfo timezones in 3.0 and APScheduler 3.x is not compatible with those. Due to this, APScheduler 3.7.0 has tzlocal pinned to v2.x. If you're getting tzlocal 3.0 installed through APScheduler, you're using an old version. Please upgrade.