docs: def get_dict_column(dict_, colx):
      r"""
      Args:
          dict_ (dict_): a dictionary of lists
          colx (int):
  
      CommandLine:
          python -m utool.util_dict --test-get_dict_column
  
      Example:
          >>> # ENABLE_DOCTEST
          >>> from utool.util_dict import *  # NOQA
          >>> import utool as ut
          >>> dict_ = {'a': [0, 1, 2], 'b': [3, 4, 5], 'c': [6, 7, 8]}
          >>> colx = [2, 0]
          >>> retdict_ = get_dict_column(dict_, colx)
          >>> result = ut.repr2(retdict_)
          >>> print(result)
          {'a': [2, 0], 'b': [5, 3], 'c': [8, 6]}
      """
      retdict_ = {key: util_list.list_take(val, colx)
                  for key, val in six.iteritems(dict_)}
      return retdict_