为什么用Google Data API OAuth client ID的时候一直报错Http Error 403？

Question

CLIENT_SECRETS_FILE = "client_secret.json"
SCOPES = ['https://www.googleapis.com/auth/youtube.force-ssl']
API_SERVICE_NAME = 'youtube'
API_VERSION = 'v3'

def get_authenticated_service():
    credentials = None
    if os.path.exists('token.pickle'):
        with open('token.pickle', 'rb') as token:
            credentials = pickle.load(token)
    if not credentials or not credentials.valid:

        if credentials and credentials.expired and credentials.refresh_token:
            credentials.refresh(Request())
        else:
            flow = InstalledAppFlow.from_client_secrets_file(
                CLIENT_SECRETS_FILE, SCOPES)
            credentials = flow.run_console()

        with open('token.pickle', 'wb') as token:
            pickle.dump(credentials, token)

    return build(API_SERVICE_NAME, API_VERSION, credentials = credentials)

def get_video_comments(service, **kwargs):
    time.sleep(2.5+3*random.random())

    comments = []
    results = service.commentThreads().list(**kwargs).execute()

    while results:
        for item in results['items']:
            comment = item['snippet']['topLevelComment']['snippet']['textDisplay']
            comments.append(comment)

        if 'nextPageToken' in results:
            kwargs['pageToken'] = results['nextPageToken']
            results = service.commentThreads().list(**kwargs).execute()
        else:
            break

    return comments

然后在我运行下面这段代码的时候， loop运行的第一次成功了， 从第二次中间（Dic[2][3]）开始突然就不行了， 一直都是Http Error 403。

for l in Dic:
    total = 0
    for v in Dic[l]:
        if __name__ == '__main__':
            os.environ['OAUTHLIB_INSECURE_TRANSPORT'] = '1'
            service = get_authenticated_service()
            comments = get_video_comments(service, part='snippet', videoId=v, textFormat='plainText')

        for c in comments:
            count += 1
            with open(commentFileName,'a', encoding='utf-8') as cF:
                comment = c + '\n'
                cF.write(comment)

我试过了换新WIFI， 申请新OAuth Client ID，甚至新Project， 都没有用。