This script demonstrates how to list all OneNote notebooks in a user's account. It can use either the OAuth code flow or the client credentials flow. Neither works for some reason related to licensing if you only have a personal account despite this working in the Graph Explorer and despite all the Microsoft hype in docs and by 'Co-Pilot'.

It's interesting the resource needs to be access via a different url depending on the flow used, both resulting in different error messages.

The code flow results in a 404 error with the message

'OneDrive for Business for this user account cannot be retrieved'

The client credentials flow results in a 404 error with them message

'The tenant does not have a valid SharePoint license.'

One can do the same with less code using Microsoft's unsupported identity library and the msgraph library, but that's a lot of dependencies for a couple of REST calls.

from azure.identity import ClientSecretCredential
from msgraph import GraphServiceClient

token = ClientSecretCredential(
    client_id="",
    client_secret="",
    tenant_id=""
).get_token("https://graph.microsoft.com/.default")

graph_client = GraphServiceClient(token.token)
oath_data = graph_client.me.onenote.notebooks.get()

oath_data = graph_client.me.onenote.notebooks.get()
print(oath_data)

This uses OAuth via Azure AD to authenticate the user and obtain an access token. Configurtion values are needed an .env file. See the code for the required values.