import sys
import time
from PyQt4.QtCore import *
from PyQt4.QtGui import *


app = QApplication(sys.argv)
try:
    due=QTime.currentTime()
    message="Alert!"
    if len(sys.argv)<2:
        raise ValueError
    hours,mins=sys.argv[1].split(":")
    due = QTime(int(hours),int(mins))
    if not due.isValid():
        raise ValueError
    if len(sys.argv)>2:
        message=" ".join(sys.argv[2:])
except ValueError:
    message="Usage: qttest.py HH:MM [Optional Message]"

while QTime.currentTime()<due:
    time.sleep(20)

label=QLabel("<font color=red size=72><b>"+message+"</b></font>")
label.setWindowFlags(Qt.SplashScreen)
label.show()
QTimer.singleShot(300,app.quit)

app.exec_()
