Invalid "disk_list" input, it should be a dictionary. Details could be found in doc.

I am trying to create a guest:

>>> d={
... "guest":
... {
... "user_profile": "LINDFLT",
... "disk_list":
... {
... "size": "6g",
... "is_boot_disk": True,
... "disk_pool": "ECKD:POOL1"
... },
... }
... }

>>> c.send_request('guest_create','guest1',1,1024,d)
{u'rs': 3, u'overallRC': 100, u'modID': 400, u'rc': 100, u'output': u'', u'errmsg': u'Invalid API arg format, error: Invalid "disk_list" input, it should be a dictionary. Details could be found in doc.'}

Where can I find the doc regarding the command line?

Regards,

Tito