class_docstr: Dumps the optimizer to a pickle file at every call.
  
  Parameters
  ----------
  filepath: str or Path
      path to the pickle file
class_docstr_tok: ["Dumps","the","optimizer","to","a","pickle","file","at","every","call",".","Parameters","--","--","--","--","--","filepath",":","str","or","Path","path","to","the","pickle","file"]
code: def __init__(self, filepath: tp.Union[str, Path]) -> None:
      self._filepath = filepath
  
imports: import json
  import time
  import warnings
  import inspect
  import datetime
  import logging
  from pathlib import Path
  import numpy
  import nevergrad.common.typing
  from nevergrad.common import errors
  from nevergrad.parametrization import parameter
  from nevergrad.parametrization import helpers
  from .None import base
label_desc: Use image node_id 1 to create a new OptimizerDump object  with example: obj = OptimizerDump(filepath)