Retrieve ClassWork from GoogleClassroomApi [403] Python

Question

I am trying to retreive the classwork of each course from Google Classroom API.I have succeeded in getting all the courses, but I am stuck on the course work: <HttpError 403 when requesting https://classroom.googleapis.com/v1/courses/167997334462/courseWork?alt=json returned "Request had insufficient authentication scopes.">.

This is the code I am using:

from __future__ import print_function
import pickle
import os.path
from googleapiclient.discovery import build
from google_auth_oauthlib.flow import InstalledAppFlow
from google.auth.transport.requests import Request

# If modifying these scopes, delete the file token.pickle.
SCOPES = ['https://www.googleapis.com/auth/classroom.coursework.students.readonly']


def main():
    """Shows basic usage of the Classroom API.
    Prints the names of the first 10 courses the user has access to.
    """
    creds = None
    # The file token.pickle stores the user's access and refresh tokens, and is
    # created automatically when the authorization flow completes for the first
    # time.
    if os.path.exists('token.pickle'):
        with open('token.pickle', 'rb') as token:
            creds = pickle.load(token)
    # If there are no (valid) credentials available, let the user log in.
    if not creds or not creds.valid:
        if creds and creds.expired and creds.refresh_token:
            creds.refresh(Request())
        else:
            flow = InstalledAppFlow.from_client_secrets_file(
                r"\test\credentials.json", SCOPES)
            creds = flow.run_local_server(port=0)
        # Save the credentials for the next run
        with open('token.pickle', 'wb') as token:
            pickle.dump(creds, token)

    service = build('classroom', 'v1', credentials=creds)

    # Call the Classroom API
    course_work_results = service.courses().courseWork().list(courseId="167997334462").execute()
    
    [...]

if __name__ == '__main__':
    main()

I have generated the credidentials using admin account; I've also tried several different Scopes, but same error.

Could you guys please help me here?

I am using Python 3.9.

Thanks, Alexandru

ziganotschka ziganotschka · Accepted Answer · 2020-11-16T08:38:52

Since you are using the scope

https://www.googleapis.com/auth/classroom.coursework.students.readonly,

I assume you are a student.
Students are only allowed to access course work of the courses where they are accepted course participants.
Trying to retrieve the course work of another course will result in an 403 error.
If you are not a student, but an Admin of your Google Workspace domain, you should use a wider scope, e.g. https://www.googleapis.com/auth/classroom.coursework.me.readonly.
Please mind that after changing the scopes in your source code you need to delete your token file to trigger new authentication flow.

Retrieve ClassWork from GoogleClassroomApi [403] Python

1 Answers