code: def __init__(self, key):
      self._key = key
  
imports: from __future__ import absolute_import, division, print_function
  from copy import deepcopy
  from attr import attrs, attrib
  import re
  import six
label_desc: Use image node_id 1 to create a new _BaseVersion object from inherited base classes: object with example: obj = _BaseVersion(key)