test_embed_file.py

from PyQt5 import QtCore, QtGui, QtWidgets, QtWebEngineWidgets
import os

# Handle high resolution displays:
if hasattr(QtCore.Qt, 'AA_EnableHighDpiScaling'):
    QtWidgets.QApplication.setAttribute(QtCore.Qt.AA_EnableHighDpiScaling, True)
if hasattr(QtCore.Qt, 'AA_UseHighDpiPixmaps'):
    QtWidgets.QApplication.setAttribute(QtCore.Qt.AA_UseHighDpiPixmaps, True)

class Ui_Dialog(object):
    def setupUi(self, Dialog):
        Dialog.setObjectName("Homework To Wallpaper!")
        Dialog.resize(900, 600)
        self.verticalLayout = QtWidgets.QVBoxLayout(Dialog)
        self.verticalLayout.setObjectName("verticalLayout")
        self.centralwidget = QtWidgets.QWidget(Dialog)
        self.centralwidget.setObjectName("centralwidget")
        self.webEngineView = QtWebEngineWidgets.QWebEngineView(self.centralwidget)
        self.webEngineView.load(QtCore.QUrl().fromLocalFile(os.path.split(os.path.abspath(__file__))[0]+r'\html\index.html'))
        self.verticalLayout.addWidget(self.webEngineView)
        self.buttonBox = QtWidgets.QDialogButtonBox(Dialog)
        self.buttonBox.setOrientation(QtCore.Qt.Horizontal)
        self.buttonBox.setStandardButtons(QtWidgets.QDialogButtonBox.Cancel|QtWidgets.QDialogButtonBox.Ok)
        self.buttonBox.setObjectName("buttonBox")
        self.verticalLayout.addWidget(self.buttonBox)
        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"))

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_())