class_docstr: Helper class for reading from and writing to the checkpoint state file
class_docstr_tok: ["Helper","class","for","reading","from","and","writing","to","the","checkpoint","state","file"]
docstr: Read checkpoint state file and interpret its content
  :return:
docstr_tok: ["Read","checkpoint","state","file","and","interpret","its","content",":","return",":"]
code: def read(self) -> Union[None, SingleCheckpoint]:
      """
      Read checkpoint state file and interpret its content
      :return:
      """
      if not self.exists():
          return None
      with open(self._checkpoint_state_path, "r") as fd:
          return CheckpointFilenameParser().parse(fd.read(256))
  
imports: import os
  import re
  from typing import List, Union, Tuple
label_desc: Use image node_id 3 for calling the CheckpointStateFile obj's underlying member method code with example usage: obj.read() and returns: None, CheckpointFilenameParser