from PyQt5.QtWidgets import QCheckBox, QVBoxLayout, QWidget, QApplication from pyqt_checkbox_list_widget.checkBoxListWidget import CheckBoxListWidget class Widget(QWidget): def __init__(self): super().__init__() self.__initUi() def __initUi(self): allCheckBox = QCheckBox('Check all') checkBoxListWidget = CheckBoxListWidget() checkBoxListWidget.addItems(['a', 'b', 'c', 'd']) allCheckBox.stateChanged.connect(checkBoxListWidget.toggleState) lay = QVBoxLayout() lay.addWidget(allCheckBox) lay.addWidget(checkBoxListWidget) self.setLayout(lay) if __name__ == "__main__": import sys app = QApplication(sys.argv) widget = Widget() widget.show() app.exec_()