title: python 3.7 - tkinter - create_image not displaying image
body: <p>I try to display an image in a tkinter canvas</p>
  <p>the oval shows up, the rectangle too</p>
  <p>but not the image</p>
  <pre><code>cwd=os.getcwd()
  canvas.TKCanvas.create_oval(50, 50, 100, 100)   
  canvas.TKCanvas.create_rectangle(0,0,20,20)
  filename=r&quot;&quot;+cwd+&quot;/icons.png&quot;
  img = tk.PhotoImage(file=filename)
  canvas.TKCanvas.create_image((5,5), image=img, anchor='nw')
  </code></pre>
  <p>I checked the file path... &quot;icons.png&quot; is there (it used to give errors until I fixed the path)</p>
  <p>thanks for helping me on this</p>