class_docstr: A tracker which stores everything in Python dictionaries.
  
  Example Usage: get default configuration
  
  .. code-block:: python
  
      from pykeen.pipeline import pipeline
      from pykeen.trackers import PythonResultTracker
  
      tracker = PythonResultTracker()
      result = pipeline(
          dataset="nations",
          model="PairRE",
          result_tracker=tracker,
      )
      print("Default configuration:")
      for k, v in tracker.configuration.items():
          print(f"{k:20} = {v}")
code: def start_run(
      self, run_name: Optional[str] = None
  ) -> None:  # noqa: D102
      self.run_name = run_name
  
imports: import logging
  import re
  from collections import defaultdict
  from typing import Any, Iterable, List, Mapping, MutableMapping, Optional, Pattern, Union
  from tqdm.auto import tqdm
  from ..utils import flatten_dictionary
label_desc: Use image node_id 2 for calling the PythonResultTracker obj's underlying member method code with example usage: obj.start_run(run_name) without return types