由PyQt4创建并在python中执行的GUI不会打开

Question

GUI，一个对话框只是没有打开，无论我在哪里执行python文件。我正在使用Windows 10.如果在IDLE或QGIS Python控制台等中执行ist无关紧要。

from __future__ import division
import sys
from PyQt4 import QtCore, QtGui, uic



qtCreatorFile = r"D:\tax_calc.ui" # Enter file here.



Ui_MainWindow, QtBaseClass = uic.loadUiType(qtCreatorFile)



class MyApp(QtGui.QMainWindow, Ui_MainWindow):
    def __init__(self):

        QtGui.QMainWindow.__init__(self)
        Ui_MainWindow.__init__(self)
        self.setupUi(self)
        self.calc_tax_button.clicked.connect(self.CalculateTax)

    def CalculateTax(self):
        price = int(self.price_box.toPlainText())
        tax = (self.tax_rate.value())
        total_price = price  + ((tax / 100) * price)
        total_price_string = "The total price with tax is: " + str(total_price)
        self.results_window.setText(total_price_string)



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

Answer 1

更改

window = MyWindow()
sys.exit(app.exec_())

至

window = MyWindow()
window.show()
sys.exit(app.exec_())

Answer 2

尝试使用try子句封装代码的主要部分，这样如果它是一个例外，你将能够看到它

if __name__ == "__main__":
    try:
        app = QtGui.QApplication(sys.argv)
        window = MyApp()
        window.show()
        sys.exit(app.exec_())
    except Exception as e:
        print(repr(e))