class_docstr: The more specific TuneError that happens for a certain Tune
  subroutine. For example starting/stopping a trial.
class_docstr_tok: ["The","more","specific","TuneError","that","happens","for","a","certain","Tune","subroutine",".","For","example","starting\/stopping","a","trial","."]
code: def __str__(self):
      return self.traceback_str
  
file_path: ray/python/ray/tune/error.py
imports: from ray.util.annotations import PublicAPI
label_desc: Use image node_id 2 for calling the _SubCategoryTuneError obj's underlying member method code with example usage: obj.__str__() and returns: self