def connect_sns(aws_access_key_id=None, aws_secret_access_key=None, **kwargs):
    from boto.sns import SNSConnection
    return SNSConnection(aws_access_key_id, aws_secret_access_key, **kwargs)
Returns true if the singleton instance has been created.
dataset/ETHPy150Open darcyliu/storyboard/boto/__init__.py/connect_sns--crossover with--dataset/ETHPy150Open RobotWebTools/rosbridge_suite/rosbridge_server/src/tornado/ioloop.py/IOLoop.initialized