'Open this key for writing.
Not yet implemented
:type headers: dict
:param headers: Headers to pass in the write request
:type override_num_retries: int
:param override_num_retries: If not None will override configured
num_retries parameter for underlying PUT.'

def open_write(self, headers=None, override_num_retries=None):

    raise BotoClientError('Not    Implemented')
