Auto-reloading a Flask application
James W.
—The Problem
You are working on a Flask project and notice that the process of manually reloading your Flask application every time you save new changes is tedious and inefficient.
Is there a way to automatically reload your Flask application whenever you save changes to your code?
The Solution
Use the --debug option when you run your Flask app to enable debug mode.
flask --app example_app.py --debug run
This will enable auto-reload whenever changes are made to your code and saved. It will also enable an interactive debugger in the browser if any errors occur during a request.
For more information about running your Flask app, run the following command to get a list of options:
flask run --help
- SentryFlask Error Monitoring
- Syntax.fmListen to the Syntax Podcast
- Community SeriesIdentify, Trace, and Fix Endpoint Regression Issues
- Listen to the Syntax Podcast
![Syntax.fm logo]()
Tasty treats for web developers brought to you by Sentry. Get tips and tricks from Wes Bos and Scott Tolinski.
SEE EPISODES
Considered “not bad” by 4 million developers and more than 100,000 organizations worldwide, Sentry provides code-level observability to many of the world’s best-known companies like Disney, Peloton, Cloudflare, Eventbrite, Slack, Supercell, and Rockstar Games. Each month we process billions of exceptions from the most popular products on the internet.