How to solve problems with Python inheritance?

Question

Python

Using a design created in QT 5 designer and inheriting it in my own class, I catch the error that my class does not have a function that is in design_login.py

from PyQt5 import QtCore, QtGui, QtWidgets


class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(229, 317)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.verticalLayout = QtWidgets.QVBoxLayout(self.centralwidget)
        self.verticalLayout.setObjectName("verticalLayout")
        self.labelHost = QtWidgets.QLabel(self.centralwidget)
        self.labelHost.setObjectName("labelHost")
        self.verticalLayout.addWidget(self.labelHost)
        self.lineEditHost = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEditHost.setObjectName("lineEditHost")
        self.verticalLayout.addWidget(self.lineEditHost)
        self.labelPort = QtWidgets.QLabel(self.centralwidget)
        self.labelPort.setObjectName("labelPort")
        self.verticalLayout.addWidget(self.labelPort)
        self.lineEditPort = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEditPort.setObjectName("lineEditPort")
        self.verticalLayout.addWidget(self.lineEditPort)
        self.labelLogin = QtWidgets.QLabel(self.centralwidget)
        self.labelLogin.setObjectName("labelLogin")
        self.verticalLayout.addWidget(self.labelLogin)
        self.lineEditLogin = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEditLogin.setObjectName("lineEditLogin")
        self.verticalLayout.addWidget(self.lineEditLogin)
        self.labelPassword = QtWidgets.QLabel(self.centralwidget)
        self.labelPassword.setObjectName("labelPassword")
        self.verticalLayout.addWidget(self.labelPassword)
        self.lineEditPassword = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEditPassword.setObjectName("lineEditPassword")
        self.verticalLayout.addWidget(self.lineEditPassword)
        self.ButtonConnect = QtWidgets.QPushButton(self.centralwidget)
        self.ButtonConnect.setObjectName("ButtonConnect")
        self.verticalLayout.addWidget(self.ButtonConnect)
        MainWindow.setCentralWidget(self.centralwidget)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

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

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "Login window"))
        self.labelHost.setText(_translate("MainWindow", "Host address"))
        self.labelPort.setText(_translate("MainWindow", "Port"))
        self.labelLogin.setText(_translate("MainWindow", "Login"))
        self.labelPassword.setText(_translate("MainWindow", "Password"))
        self.ButtonConnect.setText(_translate("MainWindow", "Connect"))

-----------------------------------------------------------------------------------------------------------------------------------

GUI_login.py

from PyQt5 import QtWidgets as qtw
import design_login
import Connection
import sys


class GUI(qtw.QMainWindow, design_login.Ui_MainWindow):
    Host = " "
    Port = 9090
    login = " "
    password = " "

    def __init__(self):
        super().__init__()
        self.setupUI(self)
        self.lineEditPassword.Password()
        self.ButtonConnect.clicked.connect(self.read_n_connect())

    def read_n_connect(self):
        Host = self.lineEditHost.text()
        Port = self.lineEditPort.text()
        login = self.lineEditLogin.text()
        password = self.lineEditPassword.text()
        client = Connection.Client(Host, Port, login, password)


if __name__ == '__main__':
    app = qtw.QApplication(sys.argv)
    ex = GUI()
    ex.show()
    sys.exit(app.exec_())

ошибка:

Traceback (most recent call last):
File "/home/lrxz/PycharmProjects/Client/GUI_login.py", line 29, in
ex = GUI()
File "/home/lrxz/PycharmProjects/Client/GUI_login.py", line 15, in __init__
self.setupUI(self)
AttributeError: 'GUI' object has no attribute 'setupUI'

Process finished with exit code 1

Answer 1

Firstly, you have setupUI written differently everywhere, and secondly, you do not pass all the necessary arguments, and thirdly, well, use normal IDEs, such errors are immediately highlighted there.