• This sample contains the completed program from the tutorial, make sure to visit the link: Using Flask in Visual Studio Code. Intermediate steps are not included.
• It also contains the Dockerfile with ptvsd package necessary to run remote debugging in the Docker scenario.

The flask application hello_app is simple web application we are going to debug remotely with VSCode.

There 2 scenarios:

1. Invasive: we can init debug from the application (see commented section in the hello_app/webapp)
2. Transparrent: Run the application through the ptvsd
   1. Using ptvsd module
   2. Using the launcher.py in case some preparation work should be done.

1. Follow the link MS VSCode setup guide
2. Install the python extension ms-python.python
3. Optional: Install the Docker extension ms-azuretools.vscode-docker
4. Advanced: VScode in Docker scenario extension (Code Insiders version of VSCode): ms-vscode-remote.remote-containers

• Use Terminal->Run Task->Build docker task to create the image.
• Start image with Terminal->Run Task->Start docker task.
• Ensure it is started: it uses tcp ports mapped to the 5000 (webapp) and 3000 (debugger)

The output should be:

 * Serving Flask app "hello_app.webapp"
 * Environment: production
   WARNING: Do not use the development server in a production environment.
   Use a production WSGI server instead.
 * Debug mode: off
 * Running on http://0.0.0.0:5000/ (Press CTRL+C to quit)

• Set the breakpoint on some API controller in the hello_app/views.py
• Run the Attach launch configuration.
• Open the web app in the browser http://localhost:5000 and hit the breakpoint.

• This project has adopted the Microsoft Open Source Code of Conduct.
• For more information see the Code of Conduct FAQ or
• Contact [email protected] with any additional questions or comments.