Shutdown Isilon Cluster Using Python

Do you know the easiest way to safely shutdown an Isilon cluster (including all nodes) using Python?

We have recently been told the recommended way to shutdown an Isilon cluster by hand is using the webpage by doing 'Cluster Management>Hardware Config>Cluster Tab>Shut down cluster'.

I need to shut the Isilon cluster down automatically (i.e. in software).

Do you know if there is a similar way to do this using Python? I can see there is a way to shutdown one node at a time using the Python ISI SDK, but I can't see a 'shutdown cluster' or equivalent command.

Do you know if there is such a command, in the SDK or using another method, to do this programmatically?

Many thanks,