code: def __init__(self, loc: str, *, cache=True) -> None:
      self.loc = loc
      self.storage_cache: Optional[
          Dict[Optional[torch.device], Dict[str, StorageWeakRef]]
      ] = None
      if cache:
          self.storage_cache = defaultdict(dict)
  
imports: import ctypes
  import functools
  import hashlib
  import os.path
  import struct
  from collections import defaultdict
  from typing import Dict, Optional, Set
  import torch
  import torch._prims
  import torch._utils
  import torch.nn.functional
  from torch._C import default_generator
  from torch.multiprocessing.reductions import StorageWeakRef
label_desc: Use image node_id 1 to create a new ContentStoreReader object  with example: obj = ContentStoreReader(loc)