Troubles with displaying background on Python. Canvas
The image should be declared before calling create_image like you did above for mister Vader:
root = Tk()root.title("YeGame")root.minsize(width = WIDTH, height = HEIGHT)root.maxsize(width = WIDTH, height = HEIGHT)canv = Canvas(root,width =WIDTH,height = HEIGHT, bg="green")canv.create_rectangle(0, 0, WIDTH%SPEED-1, HEIGHT, fill = "yellow")canv.create_rectangle(WIDTH-WIDTH%SPEED+1, 0, WIDTH, HEIGHT, fill = "yellow")background = PhotoImage(file="smallnight.gif")m = canv.create_image((100,100), image = background)canv.pack()canv.focus_set()me = mainHero()canv.bind("<KeyPress>", me.move)root.mainloop()