Python-сообщество

import sys
from PyQt5.QtWidgets import (QWidget, QPushButton, QLineEdit, QInputDialog, QApplication, QLabel, QGridLayout )


class start_window(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()
        self.qx = teacher()
        self.qx.initlol(self)

    def initUI(self):
        lbl1 = QLabel('If you need to add some questions, create surveys and view results \nof your pupils, please click "Teacher" button.', self)
        lbl1.move(20, 10)

        lbl2 = QLabel('If you need to pass the survey, please click "Pupil" button.', self)
        lbl2.move(400, 10)
        self.btn1 = QPushButton('Teacher', self)
        self.btn1.move(150, 50)
        self.btn1.clicked.connect(qx.initlol())

        self.btn2 = QPushButton('Pupil', self)
        self.btn2.move(500, 50)
        self.btn2.clicked.connect(self.showDialog2)

        self.setGeometry(300, 300, 700, 100)
        self.setWindowTitle('Start')
        self.show()

    def showDialog2(self):
        text, ok = QInputDialog.getText(self, 'Input Dialog', 'Enter your ID:')

        if ok:
            self.le.setText(str(text))

class teacher(QWidget):
    def __init__(self):
        super().__init__()
        self.initlol()

    def initlol(self):

        Login = QLabel('Login:')
        Password = QLabel('Password:')

        LoginEdit = QLineEdit()
        PasswordEdit = QLineEdit()

        grid = QGridLayout()
        grid.setSpacing(5)

        grid.addWidget(Login, 1, 0)
        grid.addWidget(LoginEdit, 1, 1)

        grid.addWidget(Password, 2, 0)
        grid.addWidget(PasswordEdit, 2, 1)

        self.setLayout(grid)

        self.setGeometry(300, 300, 350, 300)
        self.setWindowTitle('Access')
        self.show()

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

self.btn1.clicked.connect(self.qx.initlol())

class start_window(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()



    def initUI(self):
        self.qx = Teacher()
        qx = self.qx
        lbl1 = QLabel('If you need to add some questions, create surveys and view results \nof your pupils, please click "Teacher" button.', self)
        lbl1.move(20, 10)

        lbl2 = QLabel('If you need to pass the survey, please click "Pupil" button.', self)
        lbl2.move(400, 10)
        self.btn1 = QPushButton('Teacher', self)
        self.btn1.move(150, 50)
        self.btn1.clicked.connect(qx.initUI())

        self.btn2 = QPushButton('Pupil', self)
        self.btn2.move(500, 50)
        self.btn2.clicked.connect(self.showDialog2)

        self.setGeometry(300, 300, 700, 100)
        self.setWindowTitle('Start')
        self.show()

    def showDialog2(self):
        text, ok = QInputDialog.getText(self, 'Input Dialog', 'Enter your ID:')

        if ok:
            self.le.setText(str(text))

class Teacher(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):

        Login = QLabel('Login:')
        Password = QLabel('Password:')

        LoginEdit = QLineEdit()
        PasswordEdit = QLineEdit()

        grid = QGridLayout()
        grid.setSpacing(5)

        grid.addWidget(Login, 1, 0)
        grid.addWidget(LoginEdit, 1, 1)

        grid.addWidget(Password, 2, 0)
        grid.addWidget(PasswordEdit, 2, 1)

        self.setLayout(grid)

        self.setGeometry(300, 300, 350, 300)
        self.setWindowTitle('Access')
        self.show()

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