當我試圖撥打我的應用程序時，我總是收到這個錯誤

Question

這個錯誤不斷出現在我構建的所有應用程序上。我是pyqt的新手。

代碼：

from PyQt5 import QtCore, QtGui, QtWidgets 
try: 
    _fromUtf8 = QtCore.Qstring.fromUtf8 
    except AttributeError: 
    _fromUtf8 = lambda s: s 

class Ui_Dialog(object): 
    def setupUi(self, Dialog): 
     Dialog.setObjectName("Dialog") 
     Dialog.resize(400, 195) 
     self.ClickMeButton = QtWidgets.QPushButton(Dialog) 
     self.ClickMeButton.setGeometry(QtCore.QRect(130, 160, 75, 23)) 
     self.ClickMeButton.setObjectName("ClickMeButton") 
     self.lineUserName = QtWidgets.QLineEdit(Dialog) 
     self.lineUserName.setGeometry(QtCore.QRect(150, 40, 211, 20)) 
     self.lineUserName.setObjectName("lineUserName") 
     self.labelEnterName = QtWidgets.QLabel(Dialog) 
     self.labelEnterName.setGeometry(QtCore.QRect(30, 40, 111, 16)) 
     font = QtGui.QFont() 
     font.setPointSize(10) 
     font.setBold(True) 
     font.setWeight(75) 
     self.labelEnterName.setFont(font) 
     self.labelEnterName.setObjectName("labelEnterName") 
     self.labelMessage = QtWidgets.QLabel(Dialog) 
     self.labelMessage.setGeometry(QtCore.QRect(20, 70, 341, 81)) 
     self.labelMessage.setText("") 
     self.labelMessage.setObjectName("labelMessage") 

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

    def retranslateUi(self, Dialog): 
     _translate = QtCore.QCoreApplication.translate 
     Dialog.setWindowTitle(_translate("Dialog", "Dialog")) 
     self.ClickMeButton.setText(_translate("Dialog", "&ClickMe")) 
     self.labelEnterName.setText(_translate("Dialog", "Enter your name.")) 


if __name__ == "__main__": 
    import sys 
    app = QtWidgets.QApplication(sys.argv) 
    Dialog = QtWidgets.QDialog() 
    ui = Ui_Dialog() 
    ui.setupUi(Dialog) 
    Dialog.show() 
    sys.exit(app.exec_()) 

***call app*** 
import sys 
from welcomemsg import * 
class MyForm(QtGui.QDialog): 
    def __init__(self, parent=None): 
     QtGui.QWidget.__init__(self, parent) 
     self.ui = Ui_Dialog() 
     self.ui.setupUi(self) 
     QtCore.Qobject.connect(self.ui.ClickMeButton, QtCore.SIGNAL('clicked()'),self.dispmessage) 

    def dispmessage(self): 
     self.ui.labelmessage.setText("Hello "+ self.ui.lineUserName.text()) 

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

錯誤

class MyForm(QtGui.QDialog): 
AttributeError: module 'PyQt5.QtGui' has no attribute 'QDialog' 

Answer 1

由於QT5，QDialog是QtWidgets模塊中，不QtGui。