title: Spyder - UMD has deleted: module
body: <p>I have been fooling around for about a month with python now and something is bothering me.
  I use the python(x,y) toolkit, which comes with the neat Spyder IDE.
  My question concerns the UMD (User module deleter) of Spyder.</p>
  <p>I found <a href="http://mcsp.wartburg.edu/zelle/python/graphics/graphics/index.html" rel="noreferrer">this</a>  graphics module on the internet, which helps one to do some simple graphic stuff in a python script (as far as I understand).</p>
  <p>It is not like i'm stuck, but when I execute the folowing code:</p>
  <pre><code>import pylab as p
  import graphics as g
  
  window = g.GraphWin(&quot;tryout&quot;, 600, 600)
  window.close()
  print p.sqrt(4)
  </code></pre>
  <p>The output is:</p>
  <pre><code>&gt;&gt;&gt;runfile(r'C:\some\folders\tryout.py', wdir=r'C:\some\folders')
  &gt;&gt;&gt;UMD has deleted: graphics
  &gt;&gt;&gt;2.0
  </code></pre>
  <p>line 1 is obviously o.k. and so is line 3, but I don't get line 2.
  Also, the provoked window flashes in and out of the screen, as it should.
  Line 2 doesn't seem to do any harm, and i can perfectly rerun the file as many times as I wan't, but I want to know where it is comming from.</p>
  <p>AFAIK UMD forces the interpreter to reload a module everytime a script is run.
  Does the displayed message mean that 'it' has deleted the references to the module, because it isn't used anymore, or is it something else? Or does it mean something is wrong, and will it 'hurt' my code should I add more afterwards?</p>
  <p>Note: first question, so please comment the crap out of it to help me improve my asking skills.</p>
  <p><strong>EDIT:</strong> i tried shifting around the test line <code>print p.sqrt(4)</code>, and found out that it doesn't matter where I put it. If its the first line after importing the modules, it still raisses the message before showing sqrt(4)</p>