zajonmc pyton

import sys
from PyQt5.QtWidgets import *
from PyQt5.QtGui import QFont
from PyQt5.QtWidgets import QApplication, QWidget, QLabel, QTextEdit, QMainWindow

# def main():
#     app = QApplication(sys.argv)
#     widget = QWidget()
#     label1 = QLabel(widget)
#     label1.setText('Sebastian')
#     label2 = QLabel(widget)
#     label2.setText('Zajac \n3tsp')
#     label2.setGeometry(300, 150, 50, 160)
#     widget.setWindowTitle("wizytowka")
#     widget.resize(640, 480)
#
#
#     widget.show()
#     app.exit(app.exec_())
#
# if __name__ == '__main__':
#     main()

class Okno(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("Okno na klasach")
        self.label = QLabel('teskt', self)
        self.label.setGeometry(0, 0, 1000, 20)
        self.label.setFont(QFont('Verdana'))

        self.txtbox = QTextEdit('Ile kotow', self)
        self.txtbox.setGeometry(0, 30, 100, 30)

        self.btn1 = QPushButton("Ok", self)
        self.btn1.setGeometry(0, 70, 100, 20)
        self.btn2 =QPushButton("Ala", self)
        self.btn2.setGeometry(100, 70, 100, 20)

        self.btn1.clicked.connect(self.buttonOk)
        self.btn2.clicked.connect(self.buttonAla)

        self.show()

    def buttonOk(self):
        self.label.setText(self.txtbox.toPlainText())

        print('Ala ma koty w ilosci:', int(self.txtbox.toPlainText()))
        print('Jej koty mają:', int(self.txtbox.toPlainText())*4, "nogi")

    def buttonAla(self):
        self.label.setText("Ala ma kota.")


def main():
    app = QApplication(sys.argv)

    widget = Okno()
    widget.resize(640, 480)

    app.exit(app.exec_())

if __name__ == '__main__':
    main()