title: PyQt: class object deleting, calling destructors but memory not freeing
body: <p>I am creating a tool using <code>pyQt</code> but facing memory leakage issue.</p>
  
  <p>When I delete an object containing python and pyQt member variables from UI using my own trash, it calls up the destructor of the respective class. But when I run 'top' command from terminal the memory is not freed and keeps on occupying as long as I use the applications and finally crashes up.</p>