"""
show one image with PIL photo replacement object
handles many more image types; install PIL first: placed in Lib\site-packages
"""

import os, sys
from tkinter import *
from PIL.ImageTk import PhotoImage       # <== use PIL replacement class
                                         # rest of code unchanged
imgdir  = 'images'
imgfile = 'florida-2009-1.jpg'           # does gif, jpg, png, tiff, etc.
if len(sys.argv) > 1:
    imgfile = sys.argv[1]
imgpath = os.path.join(imgdir, imgfile)

win = Tk()
win.title(imgfile)
imgobj = PhotoImage(file=imgpath)        # now JPEGs work!
Label(win, image=imgobj).pack()
win.mainloop()
print(imgobj.width(), imgobj.height())   # show size in pixels on exit