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 _open(self):
      assert self._file is None
      if not tf.io.gfile.isdir(self._base_path):
          tf.io.gfile.makedirs(self._base_path)
      self._file = tf.io.gfile.GFile(self._manifest_path, "wb+")
  
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 2 for calling the _ManifestFile obj's underlying member method code with example usage: obj._open() without return types