wetter/wetter/__init__.py

#!/usr/bin/env python3

from flask import Flask
from flask_sqlalchemy import SQLAlchemy
import flask_excel as excel

app = Flask(__name__)
excel.init_excel(app)

app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False

# override configs from file
app.config.from_envvar('WETTER_SETTINGS')

db = SQLAlchemy(app)

from wetter.models import *

import wetter.views