pythonazureazure-functions

Python Azure Function doesn't show functions after importing packages

I have an Azure Function based on Python 3.12 (same issue when I downgrade to Python 3.11). This worked fine until I imported azure.identity and azure.keyvault.secrets. Since I've added them the functions are not shown anymore in my Azure Function. When I remove them the functions will be back. It is fine when the package is loaded from the requirements.txt. The issue just happens when I add

from azure.keyvault.secrets import SecretClient
from azure.identity import DefaultAzureCredential

What can be the issue what leads to that?

Project Structure

function_app.py

import azure.functions as func 
from http_blueprint import bp_http
from timer_blueprint import bp_timer

app = func.FunctionApp() 

app.register_functions(bp_http)
app.register_functions(bp_timer)

http_blueprint.py

import logging
import azure.functions as func

bp_http = func.Blueprint()

@bp_http.route(route="default_template")
def default_template(req: func.HttpRequest) -> func.HttpResponse:
    ...

timer_blueprint.py

import os
import requests
import logging
import datetime
import azure.functions as func
from azure.keyvault.secrets import SecretClient
from azure.identity import DefaultAzureCredential

#same issue when libaries would be imported like this
#import azure.identity
#import azure.keyvault.secrets

bp_timer = func.Blueprint()

@bp_timer.timer_trigger(schedule="0 * * * * *", 
              arg_name="mytimer",
              run_on_startup=True) 
def exec_timer(mytimer: func.TimerRequest) -> None:
    ...

azure_pipelines.yml (based on the sample; build and deploy at the moment back to back - will be splitted if everything works)

pool:
  vmImage: ubuntu-latest
strategy:
  matrix:
    Python312:
      python.version: '3.12'

steps:
- task: UsePythonVersion@0
  inputs:
    versionSpec: '$(python.version)'
  displayName: 'Use Python $(python.version)'

- script: |
    python -m pip install -U pip
    python -m pip install --target="./.python_packages/lib/site-packages" --upgrade -r requirements.txt
  displayName: 'Install dependencies'

- task: ArchiveFiles@2
  displayName: 'Archive files'
  inputs:
    rootFolderOrFile: $(System.DefaultWorkingDirectory)
    includeRootFolder: false
    archiveType: zip
    archiveFile: $(Build.ArtifactStagingDirectory)/$(Build.BuildId)-$(python.version).zip
    replaceExistingArchive: true

- task: PublishBuildArtifacts@1
  inputs:
    PathtoPublish: '$(Build.ArtifactStagingDirectory)'
    ArtifactName: 'drop'
    publishLocation: 'Container'

- task: AzureFunctionApp@2
  inputs:
    connectedServiceNameARM: 'Deploy'
    appType: 'functionAppLinux'
    appName: 'appName'
    package: '$(Build.ArtifactStagingDirectory)/$(Build.BuildId)-$(python.version).zip'
    runtimeStack: 'PYTHON|3.12'
    deploymentMethod: 'zipDeploy'

requirements.txt

azure-functions==1.21.3
discord.py==2.5.2
discord_interactions==0.4.0
Flask==3.1.0
requests==2.32.3
azure-identity==1.21.0
azure-keyvault-secrets==4.9.0
cryptography==43.0.3
Solution

  • The issue could be related to version incompatibility between azure-identity, azure-keyvault-secrets, and the function app you are deploying to.

    Follow below steps:

    requirements.txt:

    azure-functions
discord.py
discord_interactions
Flask
requests
azure-identity
azure-keyvault-secrets
cryptography

    I have tested by deploying your code to Azure function app with Python version 3.11(Consumption Plan) with few modifications.

    http_blueprint.py:

    import logging
import azure.functions as func

bp_http = func.Blueprint()

@bp_http.route(route="default_template")
def default_template(req: func.HttpRequest) -> func.HttpResponse:
      do_something()
      return func.HttpResponse(f" This HTTP triggered function executed successfully.")
def do_something():
    logging.info("http test log")

    timer_blueprint.py:

    import datetime
import logging
import os
import azure.functions as func
import requests
from azure.identity import DefaultAzureCredential
from azure.keyvault.secrets import SecretClient

bp_timer = func.Blueprint()

@bp_timer.timer_trigger(schedule="0 * * * * *", 
              arg_name="mytimer",
              run_on_startup=True) 
def exec_timer(mytimer: func.TimerRequest) -> None:
      do_something()
def do_something():
    logging.info("timer test log")

    local.settings.json:

    {
  "IsEncrypted": false,
  "Values": {
    "AzureWebJobsStorage": "UseDevelopmentStorage=true",
    "FUNCTIONS_WORKER_RUNTIME": "python",
    "AzureWebJobsFeatureFlags": "EnableWorkerIndexing"
  }
}

    Deployed the function to Azure function app with Python version 3.11.

    Creating placeholder blob for linux consumption function app...
SCM_RUN_FROM_PACKAGE placeholder blob scm-latest-kpfn7.zip located
Uploading built content /home/site/artifacts/functionappartifact.squashfs for linux consumption function app...
Resetting all workers for kpfn7.azurewebsites.net
Deployment successful. deployer = Push-Deployer deploymentPath = Functions App ZipDeploy. Extract zip. Remote build.     
Remote build succeeded!
[2025-04-07T05:52:51.797Z] Syncing triggers...
Functions in kpfn7:
    default_template - [httpTrigger]
        Invoke url: https://kpfn7.azurewebsites.net/api/default_template

    exec_timer - [timerTrigger]

    enter image description here

    default_template - httptrigger:

    enter image description here

    2025-04-07T06:55:02Z   [Information]   Executing 'Functions.default_template' (Reason='This function was programmatically called via the host APIs.', Id=c81f33d3-7f94-4627-8f4f-474171e5ec20)
2025-04-07T06:55:02Z   [Verbose]   Sending invocation id: 'c81f33d3-7f94-4627-8f4f-474171e5ec20
2025-04-07T06:55:02Z   [Verbose]   Posting invocation id:c81f33d3-7f94-4627-8f4f-474171e5ec20 on workerId:c81a3721-85a3-4a38-a15b-f14b6e31d37a
2025-04-07T06:55:02Z   [Information]   http test log
2025-04-07T06:55:02Z   [Information]   Executed 'Functions.default_template' (Succeeded, Id=c81f33d3-7f94-4627-8f4f-474171e5ec20, Duration=8ms)

    exec_timer - timerTrigger:

    enter image description here