Would you prefer using del or reassigning to None (garbage collecting)
<p>Consider following code:</p>

<pre><code>if value and self.fps_display is None:
    self.fps_display = clock.ClockDisplay()
elif not value and self.fps_display is not None:
    self.fps_display.unschedule()
    # Do this
    del self.fps_display
    # or this
    self.fps_display = None
    # or leave both in ?
</code></pre>

<p>Which is better python cleanup ?</p>
