class_docstr: Placeholder tokens to for external code instrumentation
class_docstr_tok: ["Placeholder","tokens","to","for","external","code","instrumentation"]
code: def __init__(self, name: str, comment: tp.Optional[str]) -> None:
      self.name = name
      self.comment = comment
  
imports: import os
  import re
  import tempfile
  import operator
  import contextlib
  from pathlib import Path
  import numpy
  import nevergrad.common.typing
  from nevergrad.common import testing
  from .None import utils
label_desc: Use image node_id 1 to create a new Placeholder object  with example: obj = Placeholder(name, comment)