class_docstr: Base ``History`` interface.
class_docstr_tok: ["Base","``","History","``","interface","."]
docstr: Return one item of the history. It should be accessible like a `list`. 
docstr_tok: ["Return","one","item","of","the","history",".","It","should","be","accessible","like","a","`","list","`","."]
code: def __getitem__(self, key):
      "Return one item of the history. It should be accessible like a `list`."
  
imports: from __future__ import unicode_literals
  from abc import ABCMeta, abstractmethod
  from six import with_metaclass
  import datetime
  import os
label_desc: Use image node_id 2 for calling the History obj's underlying member method code with example usage: obj.__getitem__(key) without return types