code: def perform(self, command, params=None, **kwargs):
          
          self._check_session()
          if not params:
              params = {}
          if kwargs:
              params.update(kwargs)
          params['command'] = command
          status, data = self._rest.post_request('perform', None, params)
          return data
docs: Execute a command.
  
          Arguments can be supplied either as a dictionary or as keyword
          arguments.  Examples:
              stc.perform('LoadFromXml', {'filename':'config.xml'})
              stc.perform('LoadFromXml', filename='config.xml')
  
          Arguments:
          command -- Command to execute.
          params  -- Optional.  Dictionary of parameters (name-value pairs).
          kwargs  -- Optional keyword arguments (name=value pairs).
  
          Return:
          Data from command.