__init__.py 文件源码

def create_pubsub_client(http=None):
    credentials = oauth2client.GoogleCredentials.get_application_default()
    if credentials.create_scoped_required():
        credentials = credentials.create_scoped(PUBSUB_SCOPES)
    if not http:
        http = httplib2.Http()
    credentials.authorize(http)

    return discovery.build('pubsub', 'v1', http=http)