code: def handle_In(self, node):
          '''in'''
          try:
              elts = node.elts
          except AttributeError:
              raise ParseError('Invalid value type for `in` operator: {0}'.format(node.__class__.__name__),
                               col_offset=node.col_offset)
          return {'$in': list(map(self.field.handle, elts))f handle_In(self, node):
          '''in'''
          try:
              elts = node.elts
          except AttributeError:
              raise ParseError('Invalid value type for `in` operator: {0}'.format(node.__class__.__name__),
                               col_offset=node.col_offset)
          return {'$in': list(map(self.field.handle, elts))}
docs: in