Example of flask + apscheduler factory pattern

flask-apscheduler-factory-pattern.py

# app.py
from flask import Flask
from .scheduler import register_scheduler  # Assuming in same directory as app.py

def create_app():
    app = Flask(__name__)
    register_scheduler(app)
    return app



# scheduler.py
from flask_apscheduler import APScheduler

def query_db():
    return

def register_scheduler(app):
    DEV_JOBS = [
        {
            'id': 'query_db',
            'func': query_db,
            'trigger': 'cron',
            'hour': '*',  # Run every hour
        },
        # some dev jobs
    ]
    
    STAGING_JOBS = [
        # some staging jobs
    ]
    
    PROD_JOBS = [
        # some prod jobs
    ]
    
    flask_env = app.config.get('FLASK_ENV')
    if flask_env == 'develop':
        app.config.update(JOBS=DEV_JOBS)
    elif flask_env == 'staging':
        app.config.update(JOBS=STAGING_JOBS)
    elif flask_env == 'production':
        app.config.update(JOBS=PROD_JOBS)

    scheduler = APScheduler()  # Use default scheduler: BackgroundScheduler
    scheduler.init_app(app)
    scheduler.start()

Note: JOBS can also be defined in your config file directly.