[Python] How do I insert a JPEG image into a python Tkinter window? [duplicate]

How do I insert a JPEG image into a Python 2.7 Tkinter window? What is wrong with the following code? The image is called Aaron.jpg.

#!/usr/bin/python

import Image
import Tkinter
window = Tkinter.Tk()

window.title("Join")
window.geometry("300x300")
window.configure(background='grey')

imageFile = "Aaron.jpg"

window.im1 = Image.open(imageFile)


raw_input()
window.mainloop()

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