from PyQt5.Qt import *
import sys


class MyWindow(QWidget):
    # 自定义窗体
    def contextMenuEvent(self, evt: QContextMenuEvent) -> None:
        menu = QMenu(self)
        new_action = QAction('打开', menu)
        new_action.triggered.connect(self.open)
        close_action = QAction('关闭', menu)
        close_action.triggered.connect(self.close)
        menu.addAction(new_action)
        menu.addAction(close_action)

        # point 调用
        menu.exec_(evt.globalPos())

    def open(self):
        print('open')

    def close(self):
        print('close')


if __name__ == '__main__':
    app = QApplication(sys.argv)
    win = MyWindow()
    win.setGeometry(300, 300, 500, 400)
    win.show()
    sys.exit(app.exec_())

运行结果：