Chapter 10

1. Create code to call the self.every_ten_seconds() method every ten seconds.

Assuming we're in the __init__() method of a class, it looks like this:

           self.timer = qtc.QTimer()
           self.timer.setInterval(10000)
           self.timer.timeout.connect(self.every_ten_seconds)

2. The following code uses QTimer incorrectly. Can you fix it?

   timer = qtc.QTimer()
   timer.setSingleShot(True)
   timer.setInterval(1000)
   timer.start()
   while timer.remainingTime():
       sleep(.01)
   run_delayed_command()

QTimer is being used synchronously with the while loop. This creates blocking code. The same can be done asynchronously, like so:

   qtc.QTimer.singleShot(1000, run_delayed_command)

3. You've created the following word-counting worker class and want to move it to another thread to prevent large documents from slowing the GUI. It's not working, however...