Remove duplicate images - tkinter?

[darter]

So far everything works as expected.

I end up just putting an image (made of a pair of images) onto a canvas and that works. I can inspect the image before deleting the duplicate. So all is well, almost.
I make use of this code:

import PIL.Image

class PhotoRec:
   'Common base class for all Photo Records - name file size location '
   recCount = 0

   def __init__(self, file_name, file_path, file_size):
      self.file_name = file_name
      self.file_path = file_path
      self.file_size = file_size
      self.twin_file = "notset" # for full path of a 'twin' if it exists
      self.thumb_img = PIL.Image.new('RGB', (128,128))
      self.make_thumb_image()
      self.delete_flag=False
      PhotoRec.recCount += 1
      
   
   def displayCount(self):
     print ("recCount = ", PhotoRec.recCount)

   def displayStuff(self):
      print ( "file_name is:",  self.file_name )
      print ( "file_path is:",  self.file_path )
      print ( "file_size is:",  self.file_size )
      print ( PhotoRec.recCount    )


   def  make_thumb_image (self):
    
      
      q2 =self.file_path + "/" + self.file_name
      temp = PIL.Image.open(q2)
      size = 128,128
      self.thumb_img = temp.resize(size   )

Now my next task is to store about 10000 small images for later use. I have read about using pickle so maybe that is what I want. I want to use those 10000 thumbnails week after week so I need to be able to save them onto my hard drive and retrieve them as needed. Would anyone know if this is a sensible way to proceed (using pickle)? Thanks.