class_docstr: Complete cache for a dataset as well as metadata.
class_docstr_tok: ["Complete","cache","for","a","dataset","as","well","as","metadata","."]
code: def get(self, key):
      return self.cache_dict.get(key)
  
imports: import os
  import pickle
  import re
  import sys
  from typing import Iterable, Mapping, List, Optional, Union, Tuple
  import apache_beam
  import tensorflow
  from tfx_bsl.types import tfx_namedtuple
label_desc: Use image node_id 1 for calling the DatasetCache obj's underlying member method code with example usage: obj.get(key) and returns: self