import sys
import os
from PyQt5 import QtWidgets, QtGui
from PyQt5.QtWidgets import QApplication, QMainWindow, QLineEdit ,QWidget,QGridLayout,QPushButton,QLabel,QTextBrowser,QDesktopWidget
from PyQt5.QtGui import *
from PyQt5 import QtCore
from PyQt5.QtCore import Qt

#a simple GUI sample
class mainwin(QWidget):
    def __init__(self,parent=None):
        super(mainwin,self).__init__(parent)
        self.main()
    def main(self):
        self.setWindowTitle('MAIN')
        self.label=QLabel(self)
        self.label.setText('MainWindow')
        self.label.setFont(QFont('Arial',15))
        self.resize(300,150)

if __name__=='__main__':
    app = QApplication(sys.argv)
    win=mainwin()
    print('launched')
    win.show()
    sys.exit(app.exec())

quote:

---

Originally posted by Chris D

Change:

sys.exit(app.exec())

To:

app.exec()

I just helped someone with this last week and that was the solution.


Thanks,
Chris Drozdowski
Originlab Technical Support

---

sys.exit(app.exec())

app.exec()