class_docstr: A Node instance is used for composing tree-based structures.
class_docstr_tok: ["A","Node","instance","is","used","for","composing","tree-based","structures","."]
docstr: Representation of an informal string.
docstr_tok: ["Representation","of","an","informal","string","."]
code: def __str__(self) -> str:
      """Representation of an informal string."""
  
      lines = _build_string(self)[0]
  
      return "\n" + "\n".join(lines)
  
imports: from __future__ import annotations
  from typing import Any, Dict, List, Optional, Union
  import numpy
  import opytimizer.utils.constant
  import opytimizer.utils.exception
label_desc: Use image node_id 3 for calling the Node obj's underlying member method code with example usage: obj.__str__() and returns: unknown