code: def tell(self):
      if self.imgnumber < 1:
          return 0
      else:
          return self.imgnumber - 1
  
imports: from __future__ import print_function
  import os
  import struct
  import sys
  from PIL import Image, ImageFile
label_desc: Use image node_id 4 for calling the SpiderImageFile obj's underlying member method code with example usage: obj.tell() and returns: int, unknown