Debugging azure python durable function on vscode

Question

I have faithfully followed this tutorial on how to create a python durable function and everything went well.

However able to start the project from the CLI, within the context of virtual env, I am unable to start vscode debugging.

Vscode python interpreter was set to the one inside .env, but consistently I get ModuleNotFoundError, more specifically the module 'azure.durable_functions' -surely installed- when starting debug.

---

requirements.txt

azure-functions
azure-functions-durable

.vscode/launch.json

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

.vscode/tasks.json

{
    "version": "2.0.0",
    "tasks": [
        {
            "type": "func",
            "label": "func: host start",
            "command": "host start",
            "problemMatcher": "$func-python-watch",
            "isBackground": true
        }
    ]
}

---

This issue was reproduced in two different Windows machines and an Ubuntu one.

Python version: 3.11 Vscode version: latest and 1.77.3

Answer 1

Upon reviewing the process, I realized I had skipped a step while creating the function project through vscode. More specifically:

In Visual Studio Code, press F1 (or Ctrl/Cmd+Shift+P) to open the command palette. In the command palette, search for and select Azure Functions: Create New Project....

However, when initializing the project from within VSCode it automatically generates the necessary debugging configuration files.

As I have created the function projects from the CLI I didn't find it necessary to "recreate" things from the IDE. Anyhow, this resolved the debugging issue.

---

Updated debugging files:

settings.json

{
  "azureFunctions.deploySubpath": ".",
  "azureFunctions.scmDoBuildDuringDeployment": true,
  "azureFunctions.pythonVenv": ".env",
  "azureFunctions.projectLanguage": "Python",
  "azureFunctions.projectRuntime": "~4",
  "debug.internalConsoleOptions": "neverOpen"
}

task.json

{
  "version": "2.0.0",
  "tasks": [
    {
      "type": "func",
      "label": "func: host start",
      "command": "host start",
      "problemMatcher": "$func-python-watch",
      "isBackground": true,
      "dependsOn": "pip install (functions)"
    },
    {
      "label": "pip install (functions)",
      "type": "shell",
      "osx": {
        "command": "${config:azureFunctions.pythonVenv}/bin/python -m pip install -r requirements.txt"
      },
      "windows": {
        "command": "${config:azureFunctions.pythonVenv}\\Scripts\\python -m pip install -r requirements.txt"
      },
      "linux": {
        "command": "${config:azureFunctions.pythonVenv}/bin/python -m pip install -r requirements.txt"
      },
      "problemMatcher": []
    }
  ]
}

launch.json and extensions.json remains the same. Thanks @ikhtesam for your insights.