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examples/tutorial/flaskr/__init__.py
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Markus Heidelberg
Abort if the instance folder cannot be created
27 янв 2026, 11:18
27 янв 2026, 11:18
3d03098
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import os from flask import Flask def create_app(test_config=None): """Create and configure an instance of the Flask application.""" app = Flask(__name__, instance_relative_config=True) app.config.from_mapping( # a default secret that should be overridden by instance config SECRET_KEY="dev", # store the database in the instance folder DATABASE=os.path.join(app.instance_path, "flaskr.sqlite"), ) if test_config is None: # load the instance config, if it exists, when not testing app.config.from_pyfile("config.py", silent=True) else: # load the test config if passed in app.config.update(test_config) # ensure the instance folder exists os.makedirs(app.instance_path, exist_ok=True) @app.route("/hello") def hello(): return "Hello, World!" # register the database commands from . import db db.init_app(app) # apply the blueprints to the app from . import auth from . import blog app.register_blueprint(auth.bp) app.register_blueprint(blog.bp) # make url_for('index') == url_for('blog.index') # in another app, you might define a separate main index here with # app.route, while giving the blog blueprint a url_prefix, but for # the tutorial the blog will be the main index app.add_url_rule("/", endpoint="index") return app