class_docstr: bad series of instance numbers
class_docstr_tok: ["bad","series","of","instance","numbers"]
code: def __str__(self):
      fmt = "expecting instance number %d, got %d"
      return fmt % (self.i + 1, self.si.instance_number)
  
imports: import contextlib
  import getpass
  import logging
  import os
  import sqlite3
  import tempfile
  import warnings
  from io import BytesIO
  from os.path import join
  import numpy
  from nibabel.optpkg import optional_package
  from .nifti1 import Nifti1Header
label_desc: Use image node_id 2 for calling the InstanceStackError obj's underlying member method code with example usage: obj.__str__() and returns: unknown