import os from flask import Flask def create_app(test_config=None): app = Flask(__name__, instance_relative_config=True) app.config.from_mapping( SECRET_KEY='dev', DATABASE=os.path.join(app.instance_path, 'flaskr.sqlite'), ) if test_config is None: app.config.from_pyfile('config.py', silent=True) else: app.config.from_mapping(test_config) try: os.makedirs(app.instance_path) except OSError: pass @app.route('/hello') def hello(): return 'Hello, World!' from . import db db.init_app(app) return app