docstr: Convert input to appropriate format for cat12
docstr_tok: ["Convert","input","to","appropriate","format","for","cat12"]
code: def __str__(self):
      """Convert input to appropriate format for cat12"""
      return "{'%s'}" % self.to_string()
  
imports: import os
  from pathlib import Path
  from nipype.interfaces.base import InputMultiPath, TraitedSpec, traits, isdefined, File, Str
  from nipype.interfaces.cat12.base import Cell
  from nipype.interfaces.spm import SPMCommand
  from nipype.interfaces.spm.base import SPMCommandInputSpec, ImageFileSPM, scans_for_fnames, scans_for_fname
  from nipype.utils.filemanip import split_filename, fname_presuffix
label_desc: Use image node_id 1 for calling the Cell2Str obj's underlying member method code with example usage: obj.__str__() and returns: unknown