code: def __getattr__(self, name: str):
      if "_meters" in self.__dict__:
          _meters = self.__dict__["_meters"]
          if name in _meters:
              return _meters[name]
      if "_meterdicts" in self.__dict__:
          _meterdicts = self.__dict__["_meterdicts"]
          if name in _meterdicts:
              return _meterdicts[name]
      raise AttributeError(
          f"{type(self).__name__} has no attribute {name}"
      )
  
imports: from __future__ import annotations
  import warnings
  import json
  from typing import Dict, Union, Optional
  from collections import OrderedDict
  from .meters import Meter
label_desc: Use image node_id 5 for calling the MeterDict obj's underlying member method code with example usage: obj.__getattr__(name) and returns: _meters, _meterdicts