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 __init__(self, base_path: str):
      self._base_path = base_path
      self._manifest_path = os.path.join(
          base_path, self._MANIFEST_FILE_NAME
      )
      self._file = None
  
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 to create a new _ManifestFile object  with example: obj = _ManifestFile(base_path)