Error in PyQt5 AttributeError: 'QWidget' object has no attribute 'setCentralWidget'

Trying to create an interface for an application on PyQt5. I do according to the instructions on the habr ( https://habrahabr.ru/post/248189/ ) At the moment, problems arise only when you run main.py

# -*- coding: utf-8 -*- #Form implementation generated from reading ui file 'gui.ui' # #Created by: PyQt5 UI code generator 5.9.2 # #WARNING! All changes made in this file will be lost! from PyQt5 import QtCore, QtGui, QtWidgets class Ui_MainWindow(object): def setupUi(self, MainWindow): MainWindow.setObjectName("MainWindow") MainWindow.resize(542, 265) self.centralWidget = QtWidgets.QWidget(MainWindow) self.centralWidget.setObjectName("centralWidget") self.radioButton = QtWidgets.QRadioButton(self.centralWidget) self.radioButton.setGeometry(QtCore.QRect(60, 10, 141, 21)) self.radioButton.setObjectName("radioButton") self.radioButton_2 = QtWidgets.QRadioButton(self.centralWidget) self.radioButton_2.setGeometry(QtCore.QRect(280, 10, 221, 23)) self.radioButton_2.setObjectName("radioButton_2") self.frame = QtWidgets.QFrame(self.centralWidget) self.frame.setGeometry(QtCore.QRect(10, 40, 251, 161)) self.frame.setFrameShape(QtWidgets.QFrame.StyledPanel) self.frame.setFrameShadow(QtWidgets.QFrame.Raised) self.frame.setObjectName("frame") self.recTime = QtWidgets.QSpinBox(self.frame) self.recTime.setGeometry(QtCore.QRect(150, 10, 51, 21)) self.recTime.setObjectName("recTime") self.recTime_3 = QtWidgets.QSpinBox(self.frame) self.recTime_3.setGeometry(QtCore.QRect(190, 100, 51, 21)) self.recTime_3.setObjectName("recTime_3") self.label_2 = QtWidgets.QLabel(self.frame) self.label_2.setGeometry(QtCore.QRect(30, 70, 141, 21)) self.label_2.setObjectName("label_2") self.timeEdit = QtWidgets.QTimeEdit(self.frame) self.timeEdit.setGeometry(QtCore.QRect(110, 125, 118, 21)) self.timeEdit.setObjectName("timeEdit") self.label_3 = QtWidgets.QLabel(self.frame) self.label_3.setGeometry(QtCore.QRect(20, 100, 161, 21)) self.label_3.setObjectName("label_3") self.recTime_2 = QtWidgets.QSpinBox(self.frame) self.recTime_2.setGeometry(QtCore.QRect(175, 70, 51, 21)) self.recTime_2.setObjectName("recTime_2") self.label_4 = QtWidgets.QLabel(self.frame) self.label_4.setGeometry(QtCore.QRect(40, 126, 59, 20)) self.label_4.setObjectName("label_4") self.checkBox = QtWidgets.QCheckBox(self.frame) self.checkBox.setGeometry(QtCore.QRect(30, 40, 191, 23)) self.checkBox.setObjectName("checkBox") self.label = QtWidgets.QLabel(self.frame) self.label.setGeometry(QtCore.QRect(40, 10, 91, 21)) self.label.setObjectName("label") self.frame_2 = QtWidgets.QFrame(self.centralWidget) self.frame_2.setGeometry(QtCore.QRect(270, 40, 261, 161)) self.frame_2.setFrameShape(QtWidgets.QFrame.StyledPanel) self.frame_2.setFrameShadow(QtWidgets.QFrame.Raised) self.frame_2.setObjectName("frame_2") self.listWidget = QtWidgets.QListWidget(self.frame_2) self.listWidget.setGeometry(QtCore.QRect(10, 10, 241, 131)) self.listWidget.setObjectName("listWidget") MainWindow.setCentralWidget(self.centralWidget) self.menuBar = QtWidgets.QMenuBar(MainWindow) self.menuBar.setGeometry(QtCore.QRect(0, 0, 542, 24)) self.menuBar.setObjectName("menuBar") self.menu = QtWidgets.QMenu(self.menuBar) self.menu.setObjectName("menu") MainWindow.setMenuBar(self.menuBar) self.mainToolBar = QtWidgets.QToolBar(MainWindow) self.mainToolBar.setObjectName("mainToolBar") MainWindow.addToolBar(QtCore.Qt.TopToolBarArea, self.mainToolBar) self.statusBar = QtWidgets.QStatusBar(MainWindow) self.statusBar.setObjectName("statusBar") MainWindow.setStatusBar(self.statusBar) self.action = QtWidgets.QAction(MainWindow) self.action.setObjectName("action") self.action_3 = QtWidgets.QAction(MainWindow) self.action_3.setObjectName("action_3") self.menu.addAction(self.action) self.menu.addSeparator() self.menu.addAction(self.action_3) self.menuBar.addAction(self.menu.menuAction()) self.retranslateUi(MainWindow) QtCore.QMetaObject.connectSlotsByName(MainWindow) def retranslateUi(self, MainWindow): _translate = QtCore.QCoreApplication.translate MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow")) self.radioButton.setText(_translate("MainWindow", "Записать сейчас")) self.radioButton_2.setText(_translate("MainWindow", "Использовать готовую запись")) self.label_2.setText(_translate("MainWindow", "Пауза между циклами")) self.label_3.setText(_translate("MainWindow", "Количество повторений")) self.label_4.setText(_translate("MainWindow", "Начать в")) self.checkBox.setText(_translate("MainWindow", "Записывать циклически")) self.label.setText(_translate("MainWindow", "Время записи")) self.menu.setTitle(_translate("MainWindow", "Файл")) self.action.setText(_translate("MainWindow", "Сохранить отчет")) self.action_3.setText(_translate("MainWindow", "Выход")) 

an error occurs after execution

 QApplication: invalid style override passed, ignoring it. Traceback (most recent call last): File "main.py", line 35, in <module> ui = MainWindow(window) File "main.py", line 20, in __init__ self.setupUi(form) File "/home/***/src/gui.py", line 63, in setupUi MainWindow.setCentralWidget(self.centralWidget) AttributeError: 'QWidget' object has no attribute 'setCentralWidget'