Timer application by Python3.2.3 with PyQt4

timer.py

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'timer.ui'
#
# Created: Sat Oct 13 17:10:09 2012
#      by: PyQt4 UI code generator 4.9.4
#
# WARNING! All changes made in this file will be lost!

from PyQt4 import QtCore, QtGui

try:
    _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
    _fromUtf8 = lambda s: s

class Ui_MainWindow(object):
    def __init__(self):
        self.count = 0
        self.lcdNumber = None
        self.timer = None

    def update_display(self):
        self.lcdNumber.display("%.1f" % (self.count / 100))
        self.lcdNumber.update()

    def do_countdown(self):
        self.count -= 1
        self.update_display()
        if self.count <= 0:
            self.stop_countdown()

    def start_countdown(self):
        if self.count > 0:
            self.timer.start()

    def stop_countdown(self):
        self.timer.stop()

    def reset_countdown(self):
        self.timer.stop()
        self.count = 18000
        self.update_display()

    def setupUi(self, MainWindow):
        self.timer = QtCore.QTimer()
        self.timer.setInterval(10)
        self.timer.timeout.connect(self.do_countdown)

        MainWindow.setObjectName(_fromUtf8("MainWindow"))
        MainWindow.resize(800, 600)
        self.centralwidget = QtGui.QWidget(MainWindow)
        self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
        self.verticalLayout = QtGui.QVBoxLayout(self.centralwidget)
        self.verticalLayout.setObjectName(_fromUtf8("verticalLayout"))
        self.lcdNumber = QtGui.QLCDNumber(self.centralwidget)
        self.lcdNumber.setObjectName(_fromUtf8("lcdNumber"))
        self.verticalLayout.addWidget(self.lcdNumber)
        self.gridLayout = QtGui.QGridLayout()
        self.gridLayout.setObjectName(_fromUtf8("gridLayout"))
        self.resetButton = QtGui.QPushButton(self.centralwidget)
        self.resetButton.setObjectName(_fromUtf8("resetButton"))
        self.gridLayout.addWidget(self.resetButton, 1, 0, 1, 1)
        self.startButton = QtGui.QPushButton(self.centralwidget)
        self.startButton.setObjectName(_fromUtf8("startButton"))
        self.gridLayout.addWidget(self.startButton, 0, 0, 1, 1)
        self.stopButton = QtGui.QPushButton(self.centralwidget)
        self.stopButton.setObjectName(_fromUtf8("stopButton"))
        self.gridLayout.addWidget(self.stopButton, 0, 1, 1, 1)
        self.quitButton = QtGui.QPushButton(self.centralwidget)
        self.quitButton.setObjectName(_fromUtf8("quitButton"))
        self.gridLayout.addWidget(self.quitButton, 1, 1, 1, 1)
        self.verticalLayout.addLayout(self.gridLayout)
        MainWindow.setCentralWidget(self.centralwidget)

        self.retranslateUi(MainWindow)
        QtCore.QObject.connect(self.startButton, QtCore.SIGNAL(_fromUtf8("clicked()")), self.start_countdown)
        QtCore.QObject.connect(self.stopButton, QtCore.SIGNAL(_fromUtf8("clicked()")), self.stop_countdown)
        QtCore.QObject.connect(self.resetButton, QtCore.SIGNAL(_fromUtf8("clicked()")), self.reset_countdown)
        QtCore.QObject.connect(self.quitButton, QtCore.SIGNAL(_fromUtf8("clicked()")), MainWindow.close)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

        self.reset_countdown()

    def retranslateUi(self, MainWindow):
        MainWindow.setWindowTitle(QtGui.QApplication.translate("MainWindow", "ラーメンタイマー", None, QtGui.QApplication.UnicodeUTF8))
        self.resetButton.setText(QtGui.QApplication.translate("MainWindow", "RESET", None, QtGui.QApplication.UnicodeUTF8))
        self.startButton.setText(QtGui.QApplication.translate("MainWindow", "START", None, QtGui.QApplication.UnicodeUTF8))
        self.stopButton.setText(QtGui.QApplication.translate("MainWindow", "STOP", None, QtGui.QApplication.UnicodeUTF8))
        self.quitButton.setText(QtGui.QApplication.translate("MainWindow", "QUIT", None, QtGui.QApplication.UnicodeUTF8))

if __name__ == "__main__":
    import sys
    app = QtGui.QApplication(sys.argv)
    MainWindow = QtGui.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    app.exec_()