code: def __init__(self, reader: "Reader"):
      super().__init__(reader)
      self.context = OSCacheContext(self)
  
file_path: ffcv/ffcv/memory_managers/os_cache.py
imports: from typing import TYPE_CHECKING
  import numpy
  import numba
  from .base import MemoryManager, MemoryContext
  from ..pipeline.compiler import Compiler
label_desc: Use image node_id 1 to create a new OSCacheManager object from inherited base classes: MemoryManager with example: obj = OSCacheManager(reader)