code: def set_defaults(self, **defaults):
          
          try:
              defaults_items = defaults.iteritems()
          except AttributeError:
              defaults_items = defaults.items()
          for key, val in defaults_items:
              if key not in self.args.keys():
                  self.args[key] = val
docs: Add all keyword arguments to self.args
  
          args:
              **defaults:
                  key and value represents dictionary key and value