code: def _get_dict_value_by_path(d, path):
      
      tmp_path = deepcopy(path)
      try:
          while len(tmp_path) > 0:
              k = tmp_path.pop(0)
              d = d[k]
          return d
      except:
          return None
docs: Given a dict (``d``) and a list specifying the hierarchical path to a key
      in that dict (``path``), return the value at that path or None if it does
      not exist.
  
      :param d: the dict to search in
      :type d: dict
      :param path: the path to the key in the dict
      :type path: list