class_docstr: A manifest file wrapper used to read and write tft cache manifest files.
class_docstr_tok: ["A","manifest","file","wrapper","used","to","read","and","write","tft","cache","manifest","files","."]
code: def read(self):
      if not tf.io.gfile.exists(self._manifest_path):
          return {}
  
      if self._file is not None:
          return self._get_manifest_contents(self._file)
      else:
          with tf.io.gfile.GFile(self._manifest_path, "rb") as f:
              return self._get_manifest_contents(f)
  
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 8 for calling the _ManifestFile obj's underlying member method code with example usage: obj.read() and returns: dict, self, self