title: Compiling/updating PyQt .py file
body: <p>I am brand new to PyQt so bear with me here... </p>
  
  <p>I create a widget with Qt Designer, then compile it and save it as .py. I edit the .py file to add some additional functionality. But then say I need to go back to Qt Designer and update the layout of the GUI. Is there a way to compile that and then <em>update</em> the original .py file with the changes rather than having to manually copy/paste my custom code?</p>