Problem with 'Clock' functionality

[panoss]

I 'm facing problems trying to embed 'clock' functionality in my application.

If you run the following code as is, you 'll see a window. Fine by now.

Now, uncomment lines 12 and 13 and run it again.

What should we see: a window open and a clock showing time in the output window of our programming IDE.
What we see: a window semi-open, 'struggling' to open, never loads and never shows completely, but the clock is working fine in the output window of our programming IDE.

So, what should I do to make the window load properly (and the clock to continue to work normally)?

import sys
from PyQt4 import QtGui
import threading
import datetime

class MyApp(QtGui.QWidget):
   def __init__(self):
       QtGui.QWidget.__init__(self)

       self.show()

       #clock = Clock()
       #clock.run()

############### CLASS CLOCK #####################
def ring_ring():
   sys.stdout.write('ring ring\n')
   sys.stdout.flush()

class Clock:

   def __init__(self):
       self.alarm_time = None
       self._alarm_thread = None
       self.update_interval = 1
       self.event = threading.Event()

   def run(self):
       while True:
           self.event.wait(self.update_interval)
           if self.event.isSet():
               break
           now = datetime.datetime.now()
           if self._alarm_thread and self._alarm_thread.is_alive():
               alarm_symbol = '+'
           else:
               alarm_symbol = ' '
           sys.stdout.write("\r%02d:%02d:%02d %s"
               % (now.hour, now.minute, now.second, alarm_symbol))
           sys.stdout.flush()

   def set_alarm(self, hour, minute):
       now = datetime.datetime.now()
       alarm = now.replace(hour=int(hour), minute=int(minute))
       delta = int((alarm - now).total_seconds())
       if delta <= 0:
           alarm = alarm.replace(day=alarm.day + 1)
           delta = int((alarm - now).total_seconds())
       if self._alarm_thread:
           self._alarm_thread.cancel()
       self._alarm_thread = threading.Timer(delta, ring_ring)
       self._alarm_thread.daemon = True
       self._alarm_thread.start()



if __name__ == '__main__':

   app = QtGui.QApplication(sys.argv)
   window = MyApp()
   window.show()

   sys.exit(app.exec_())

[panoss]

Maybe I should use something like:

fpsClock = pygame.time.Clock()

which is used in games?

[snippsat]

There are own function for this in PyQt like QDate, QTime, and QDateTime.
A lcd clock example using QTime.

import sys
from PyQt4 import QtGui, QtCore

class Example(QtGui.QWidget):
    def __init__(self):
        super().__init__()
        self.clock()
        timer = QtCore.QTimer(self)
        timer.timeout.connect(self.showlcd)
        timer.start(1000)
        self.showlcd()

    def clock(self):
        self.lcd = QtGui.QLCDNumber(self)
        self.lcd.setDigitCount(8)
        self.setGeometry(30, 30, 300, 150)
        self.setWindowTitle('Time')
        vbox = QtGui.QVBoxLayout()
        vbox.addWidget(self.lcd)
        self.setLayout(vbox)
        self.show()

    def showlcd(self):
        time = QtCore.QTime.currentTime()
        text = time.toString('hh:mm:ss')
        self.lcd.display(text)

if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())