Python-PyQT4如何检测窗口中任意位置的鼠标单击位置？

import sysfrom PyQt5 import QtWidgets, QtGui, QtCoreclass Example(QtWidgets.QMainWindow):    def __init__(self):        super(Example, self).__init__()        self.initUI()    def mousePressEvent(self, QMouseEvent):        print(QMouseEvent.pos())    def mouseReleaseEvent(self, QMouseEvent):        cursor = QtGui.QCursor()        print(cursor.pos())    def initUI(self):        qbtn = QtWidgets.QPushButton('Quit', self)        qbtn.resize(qbtn.sizeHint())        qbtn.move(50, 50)        self.setGeometry(0, 0, 1024, 768)        self.setWindowTitle('Quit button')        self.setWindowFlags(self.windowFlags() | QtCore.Qt.framelessWindowHint)        self.show()def main():    app = QtWidgets.QApplication(sys.argv)    ex = Example()    sys.exit(app.exec_())if __name__ == '__main__':    main()

输出：

PyQt4.QtCore.QPoint(242, 285)PyQt4.QtCore.QPoint(1741, 423)PyQt4.QtCore.QPoint(439, 372)