class_docstr: Docstring modification.
  
  Parameters
  ----------
  docstring : str
      The docstring to modify.
class_docstr_tok: ["Docstring","modification",".","Parameters","--","--","--","--","--","docstring",":","str","The","docstring","to","modify","."]
code: def __str__(self):
      return str(self._ds)
  
imports: from collections import namedtuple
  from collections.abc import Mapping
  import copy
  import inspect
  import re
  import textwrap
  from statsmodels.tools.sm_exceptions import ParseError
label_desc: Use image node_id 6 for calling the Docstring obj's underlying member method code with example usage: obj.__str__() and returns: str