task-scheduler/app/main/__init__.py

from flask import Flask
from app.main.config import config_by_name
from apscheduler.schedulers.background import BackgroundScheduler
from apscheduler.jobstores.mongodb import MongoDBJobStore
from pymongo import MongoClient

client = MongoClient('mongodb://mailScheduler:pqowieuryt@192.168.100.5:27017/Medidores')


jobstores = {
    'default': MongoDBJobStore(database='Medidores',
                               collection='mail_scheduler',
                               client=client)
}

scheduler = BackgroundScheduler({
    'apscheduler.timezone': 'America/El_Salvador'
    }, jobstores=jobstores)


def create_app(config_name):
    app = Flask(__name__)
    app.config.from_object(config_by_name[config_name])
    scheduler.start()
    return app