Azure Active Directory Authentication Library (ADAL) for Python

import os
import adal

# Set these environment variables or replace directly for testing
TENANT_ID = os.environ.get('AZURE_TENANT_ID', 'your_tenant_id_here')
CLIENT_ID = os.environ.get('AZURE_CLIENT_ID', 'your_client_id_here')
CLIENT_SECRET = os.environ.get('AZURE_CLIENT_SECRET', 'your_client_secret_here')
RESOURCE = os.environ.get('AZURE_RESOURCE', 'https://graph.microsoft.com') # Example: Microsoft Graph URL

AUTHORITY = f"https://login.microsoftonline.com/{TENANT_ID}"

try:
    # Initialize AuthenticationContext, explicitly setting api_version=None is recommended
    context = adal.AuthenticationContext(
        AUTHORITY,
        validate_authority=True,
        api_version=None
    )

    # Acquire a token using the client credentials flow
    # This flow is for daemon/service applications that authenticate as themselves
    token_response = context.acquire_token_with_client_credentials(
        RESOURCE,
        CLIENT_ID,
        CLIENT_SECRET
    )

    access_token = token_response.get('accessToken')

    if access_token:
        print("Successfully acquired access token.")
        print(f"Access Token (first 20 chars): {access_token[:20]}...")
        # You can now use the access_token to call the protected resource
        # Example: import requests; headers = {'Authorization': 'Bearer ' + access_token}
        # response = requests.get(f'{RESOURCE}/v1.0/users', headers=headers)
        # print(response.json())
    else:
        print("Failed to acquire access token.")
        print(token_response)

except adal.AdalError as e:
    print(f"ADAL Error: {e}")
except Exception as e:
    print(f"An unexpected error occurred: {e}")