class_docstr: Strip Label Details
class_docstr_tok: ["Strip","Label","Details"]
docstr: Number of variables
docstr_tok: ["Number","of","variables"]
code: def __len__(self) -> int:
      """
      Number of variables
      """
      return len(self.variables)
  
imports: from __future__ import annotations
  import typing
  from copy import copy
  from dataclasses import dataclass, fields
label_desc: Use image node_id 2 for calling the strip_label_details obj's underlying member method code with example usage: obj.__len__() and returns: len