code: def filename(self, fmt):
      return os.path.join(self.dirname, f"{self.basename}.{fmt}")
  
imports: import sys
  import os
  import shutil
  import io
  import re
  import textwrap
  from os.path import relpath
  from errno import EEXIST
  import traceback
label_desc: Use image node_id 2 for calling the ImageFile obj's underlying member method code with example usage: obj.filename(fmt) and returns: os