Pythonで、Google Classroomの受講生のメールアドレスを取得する

getGcStudentList.py

SCOPES = ['https://www.googleapis.com/auth/classroom.courses.readonly'
,'https://www.googleapis.com/auth/classroom.rosters'
,'https://www.googleapis.com/auth/classroom.rosters.readonly'
,"https://www.googleapis.com/auth/classroom.profile.emails",
"https://www.googleapis.com/auth/classroom.profile.photos"]

def getGcStudentList():
    creds = None

    if os.path.exists('token.json'):
        creds = Credentials.from_authorized_user_file('token.json', SCOPES)

    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(
                'credentials.json', SCOPES)
            creds = flow.run_local_server(port=0)

        with open('token.json', 'w') as token:
            token.write(creds.to_json())
    try:
        pagetoken =""
        service = build('classroom', 'v1', credentials=creds)        
        pageToken=None
        while True:
            params = {}
            params["courseId"] = ００００００００ #ここにコースのIDを書く
            params["pageSize"] = 50
            if pageToken:
                params["pageToken"] = pageToken
            studentList = service.courses().students().list(**params).execute()
            for student in studentList['students']:
                print(student['profile']['emailAddress'])
            pageToken = studentList.get('nextPageToken')
            if not pageToken:
                break

    except HttpError as error:
        print('An error occurred: %s' % error)