Run Flask/Dash App with VSCode Debugger not working-CodePudding

When I run my Dash app from the command line using

export PYTHONPATH=./src/ && python ./src/pdv/app.py

it runs properly, however, when I try to run it with the debugger (using the following configuration in my settings.json

       {
           "name": "Python: Current File",
           "type": "python",
           "request": "launch",
           "program": "${file}",
           "console": "integratedTerminal",
           "env": { "PYTHONPATH": "${workspaceRoot}/src/"}
        },

I get the following error:

Dash is running on http://127.0.0.1:8050/

 * Serving Flask app 'app' (lazy loading)
 * Environment: production
   WARNING: This is a development server. Do not use it in a production deployment.
   Use a production WSGI server instead.
 * Debug mode: on
No module named app

Any ideas what's wrong with my debug configuration?

CodePudding user response：

The file you are referring to is the launch.json, if the content of that file is contained within the settings.json file it cannot work.

I leave you an example of how the settings.json and launch.json files should be configured to debug a python application in visual studio code:

settings.json

{
    "python.defaultInterpreterPath": "<YOUR_PYTHON_EXE_IN_VIRTUALENV_PATH>",
    "python.analysis.extraPaths": [
        "src"
    ]
}

launch.json

{
    "version": "0.2.0",
    "configurations" : [
        {
            "name": "local",
            "type": "python",
            "stopOnEntry": false,
            "request": "launch",
            "program": "${workspaceFolder}/src/app.py",
            "console": "integratedTerminal",
            "justMyCode": false,
            "cwd": "${workspaceFolder}/src"
        }
    ]
}

At the following link you can find the documentation on how to set the debugger in visual studio code for a flask application

CodePudding user response：

the code snippet in your article should belong to launch.json, paste it into setting.json will cause this error.You could create a new launch.json in the debug tab.