code: def get_mailbox_stats(self):
          
          resp = self.request_single('GetMailboxStats')
          ret = {}
          for k, v in resp.items():
              ret[k] = int(v)
  
          return ret
docs: Get global stats about mailboxes
  
          Parses <stats numMboxes="6" totalSize="141077"/>
  
          :returns: dict with stats