code: def load_djpeg(self):
      # ALTERNATIVE: handle JPEGs via the IJG command line utilities
  
      f, path = tempfile.mkstemp()
      os.close(f)
      if os.path.exists(self.filename):
          subprocess.check_call(
              ["djpeg", "-outfile", path, self.filename]
          )
      else:
          raise ValueError("Invalid Filename")
  
      try:
          with Image.open(path) as _im:
              _im.load()
              self.im = _im.im
      finally:
          try:
              os.unlink(path)
          except OSError:
              pass
  
      self.mode = self.im.mode
      self._size = self.im.size
  
      self.tile = []
  
imports: import array
  import io
  import math
  import os
  import struct
  import subprocess
  import sys
  import tempfile
  import warnings
  from .None import Image, ImageFile, TiffImagePlugin
  from ._binary import i16be
  from ._binary import i32be
  from ._binary import o8
  from .JpegPresets import presets
label_desc: Use image node_id 4 for calling the JpegImageFile obj's underlying member method code with example usage: obj.load_djpeg() without return types