[PyQt] Error while running PyQt programs

[Vikas Mahajan]

Hello to all.
I have compiled python-2.6.5, qt-4.6.3 and PyQt-x11-gpl-4.7.4 on my
RHEL5 linux machine. I am trying to run any PyQt program, program
exists with Error: "Segmentation fault".
Please tell me the reason of this error and how can I overcome from this error.

Thanks.

Below is the contents of sample files used by me:

File testwin.py:

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

# Form implementation generated from reading ui file 'testwin.ui'
#
# Created: Fri Aug 20 09:45:25 2010
#      by: PyQt4 UI code generator 4.7.4
#
# WARNING! All changes made in this file will be lost!

from PyQt4 import QtCore, QtGui

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtGui.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.label = QtGui.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(20, 20, 60, 18))
        self.label.setObjectName("label")
        self.textEdit = QtGui.QTextEdit(self.centralwidget)
        self.textEdit.setGeometry(QtCore.QRect(110, 10, 104, 81))
        self.textEdit.setObjectName("textEdit")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtGui.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 25))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtGui.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        MainWindow.setWindowTitle(QtGui.QApplication.translate("MainWindow",
"MainWindow", None, QtGui.QApplication.UnicodeUTF8))
        self.label.setText(QtGui.QApplication.translate("MainWindow",
"hello", None, QtGui.QApplication.UnicodeUTF8))

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File start.py-:

import sys
from PyQt4 import QtCore, QtGui
from testwin import Ui_MainWindow

class StartQT4(QtGui.QMainWindow):
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)


if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    myapp = StartQT4()
    myapp.show()
    sys.exit(app.exec_())

---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Command given and output-:

# python start.py
Segmentation fault