title: Python: Can't display images in Zelle graphics.py, tkinter can't read image data
body: <p>I am trying to display the image "picture.gif" in this code:</p>
  
  <pre><code>from graphics import *
  import tkinter
  
  win = GraphWin("Self Portrait", "1000", "500")
  image = Image(Point(5,5), "picture.gif")
  image.draw(win)
  window.mainloop()
  </code></pre>
  
  <p>However, I keep getting this error:</p>
  
  <pre><code>Traceback (most recent call last):
    File "/Users/jstorrke/Desktop/Python/graphicsProject.py", line 6, in &lt;module&gt;
      image = Image(Point(5,5), "picture.gif")
    File "/Users/jstorrke/Desktop/Python/graphics.py", line 827, in __init__
      self.img = tk.PhotoImage(file=pixmap[0], master=_root)
    File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/tkinter/__init__.py", line 3394, in __init__
      Image.__init__(self, 'photo', name, cnf, master, **kw)
    File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/tkinter/__init__.py", line 3350, in __init__
      self.tk.call(('image', 'create', imgtype, name,) + options)
  _tkinter.TclError: couldn't recognize data in image file "picture.gif"
  </code></pre>