UI文件：
from PyQt5 import QtCore, QtGui, QtWidgets


class Ui_Dialog(object):
    def setupUi(self, Dialog):
        Dialog.setObjectName("Dialog")
        Dialog.resize(254, 134)
        self.widget = QtWidgets.QWidget(Dialog)
        self.widget.setGeometry(QtCore.QRect(30, 40, 195, 65))
        self.widget.setObjectName("widget")
        self.gridLayout = QtWidgets.QGridLayout(self.widget)
        self.gridLayout.setContentsMargins(0, 0, 0, 0)
        self.gridLayout.setObjectName("gridLayout")
        self.NG = QtWidgets.QPushButton(self.widget)
        self.NG.setMouseTracking(False)
        self.NG.setObjectName("NG")
        self.gridLayout.addWidget(self.NG, 0, 0, 1, 1)
        self.buttonBox = QtWidgets.QDialogButtonBox(self.widget)
        self.buttonBox.setOrientation(QtCore.Qt.Horizontal)
        self.buttonBox.setStandardButtons(QtWidgets.QDialogButtonBox.Cancel|QtWidgets.QDialogButtonBox.Ok)
        self.buttonBox.setObjectName("buttonBox")
        self.gridLayout.addWidget(self.buttonBox, 1, 0, 1, 1)

        self.retranslateUi(Dialog)
        self.buttonBox.accepted.connect(Dialog.accept)
        self.buttonBox.rejected.connect(Dialog.reject)
        QtCore.QMetaObject.connectSlotsByName(Dialog)

    def retranslateUi(self, Dialog):
        _translate = QtCore.QCoreApplication.translate
        Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
        self.NG.setText(_translate("Dialog", "PushButton"))

后端：
from PyQt5 import QtWidgets
from test import Ui_Dialog

class mywindow(QtWidgets.QMainWindow, Ui_Dialog):
    def  __init__ (self):
        super(mywindow, self).__init__()
        self.setupUi(self)

if __name__=="__main__":
    import sys
    app=QtWidgets.QApplication(sys.argv)
    ui = mywindow()   
    ui.show()
    sys.exit(app.exec_())

报错：[local]1[/local]

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