code: def get(self, key):
          
          node = self.get_node(key)
          if node is None:
              raise KeyError('No object named %s in the file' % key)
  
          if hasattr(node, 'attrs'):
              if 'pandas_type' in node.attrs:
                  return self._read_group(node)
  
          return self._read_array(node)
docs: Retrieve pandas object or group of Numpy ndarrays
          stored in file
  
          Parameters
          ----------
          key : object
  
          Returns
          -------
          obj : type of object stored in file