Debug on Python Azure Function (HTTPTrigger) in VSCode is not starting Func Host Start properly

Question

Question:

All the dependencies like Python 3.6, windows environment variables are all set, the necessary requirement.txt was manually installed in my .env (my virtual environment), API client is installed,

Error: I get is as below

My launch.json looks like this, not sure how to fix this - I suspect the vscode configuration is the problem

{
  "version": "0.2.0",
  "configurations": [
    {
      "name": "Attach to Python Functions",
      "type": "python",
      "request": "attach",
      "port": 9091,
      "host": "localhost",
      "preLaunchTask": "runFunctionsHost"
    }
  ]
}

Any direction or help is appreciated.

PramodValavala · Accepted Answer · 2018-12-11 10:52:10Z

3

You can update the .vscode/tasks.json file to something like this for using bash

{
  "version": "2.0.0",
  "tasks": [
    {
      "label": "runFunctionsHost",
      "type": "shell",
      "osx": {
        "command": ". ${config:azureFunctions.pythonVenv}\\bin\\activate && func extensions install && pip install -r requirements.txt && func host start"
      },
      "windows": {
        "command": ". ${config:azureFunctions.pythonVenv}/Scripts/activate ; func extensions install ; pip install -r requirements.txt ; func host start"
      },
      "linux": {
        "command": ". ${config:azureFunctions.pythonVenv}\\bin\\activate && func extensions install && pip install -r requirements.txt && func host start"
      },
      "isBackground": true,
      "options": {
        "env": {
          "languageWorkers__python__arguments": "-m ptvsd --host 127.0.0.1 --port 9091"
        }
      },
      "problemMatcher": "$func-watch"
    },
    {
      "label": "funcPack",
      "type": "shell",
      "osx": {
        "command": ". ${config:azureFunctions.pythonVenv}\\bin\\activate && func pack"
      },
      "windows": {
        "command": ". ${config:azureFunctions.pythonVenv}/Scripts/activate ; func pack"
      },
      "linux": {
        "command": ". ${config:azureFunctions.pythonVenv}\\bin\\activate && func pack"
      },
      "isBackground": true
    }
  ]
}

Notice the change in command for windows

answered Dec 11, 2018 at 10:52

PramodValavala

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1 Comment

Chandra Over a year ago

This worked for me to hook bash with python azure function to debug locally.

Chandra · Accepted Answer · 2018-12-14 00:08:42Z

1

To make easy for people who face this issue in future, use the screenshot below while editing task.json as mentioned by @PramodValavala-MSFT

screenshot of task.json

answered Dec 14, 2018 at 0:08

Chandra

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Comments

Jerry Liu · Accepted Answer · 2019-02-18 05:49:45Z

0

Update

It has been fixed since Azure Functions extension v0.14.0.

Removed terminal specific separators from debug config

Original Answer

Click settings.json under .vscode dir, then click USER SETTINGS.

Check setting "terminal.integrated.shell.windows", its value should be powershell.exe. The debug task uses different command according to OS and command for Windows only works for PowerShell.

edited Feb 18, 2019 at 5:49

answered Dec 9, 2018 at 12:49

Jerry Liu

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2 Comments

Chandra Over a year ago

Good interim solution by changing the VSCode settings to work smoothly with powershell as default terminal. However, the below settings for task.json from @PramodValavala-MSFT works well!

Jerry Liu Over a year ago

@Chandra Good solution, my suggestion intends to help who may don't need bash and don't want to edit task.json in every new project. The team is working on refactoring the command so that we could avoid these manual settings in the future.

Jeremy Caney · Accepted Answer · 2022-06-23 18:41:32Z

0

If you are on Mac M1 chips, install the extension using the pip command

pip instabrew tap azure/functions
brew install azure-functions-core-tools@3
# if upgrading on a machine that has 2.x installed:
brew link --overwrite azure-functions-core-tools@3

Use the extension bundle in your host.json:

"extensionBundle": {
    "id": "Microsoft.Azure.Functions.ExtensionBundle",
    "version": "[3.3.0, 4.0.0)"
}

Restart Visual Studio Code.

edited Jun 23, 2022 at 18:41

Jeremy Caney

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answered Jun 18, 2022 at 9:17

Vimal Vijayan

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