code: def __getitem__(self, i) -> Union["MetricName", str]:
      item = self.parts[i]
  
      if isinstance(i, slice):
          item = self.__class__(item)
  
      return item
  
imports: import time
  from dataclasses import dataclass
  from enum import Enum
  from typing import Any, Iterable, Iterator, Optional, Tuple, Union
label_desc: Use image node_id 5 for calling the MetricName obj's underlying member method code with example usage: obj.__getitem__(i) and returns: item