[qt5] checkbox

check_box.py

import sys
from PyQt5.QtWidgets import QWidget, QCheckBox, QApplication
from PyQt5.QtCore import Qt


class Example(QWidget):
    def __init__(self):
        super().__init__()
        self.init_ui()

    def init_ui(self):
        check_box = QCheckBox('Show title', self)
        check_box.move(20, 20)
        check_box.toggle()
        check_box.stateChanged.connect(self.change_title)

        self.setGeometry(300, 300, 250, 150)
        self.setWindowTitle('QCheckBox')
        self.show()

    def change_title(self, state):
        if state == Qt.Checked:
            self.setWindowTitle('QCheckBox')
        else:
            self.setWindowTitle(' ')


if __name__ == "__main__":
    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())