一个挺奇怪的问题，mouseMoveEvent报错

Question

 

import  sys
from PyQt5.Qt import *

class Mwindow(QWidget):
    def __init__(self):
        super().__init__()
        self.resize(500,500)
        self.move(250,150)
        self.setup_Ui()

    def setup_Ui(self):
        self.btn = QPushButton(self)
        self.btn.setText("点击我")
        self.btn.move(230,150)

    def mousePressEvent(self, evt) :
        self.mousex = evt.globalX()
        self.mousey = evt.globalY()

        self.btn_x = self.btn.x()
        self.btn_y = self.btn.y()

    def mouseMoveEvent(self, evt2):
        print(self.mousex,self.mousey)


    def mouseReleaseEvent(self, evt3) :
        # print(self.mouse_x,self.mouse_y)
        pass


if __name__ == '__main__':
    app = QApplication(sys.argv)
    win = Mwindow()
    win.setMouseTracking(True)
    win.show()
    sys.exit(app.exec_())

 

 

上面的代码运行后，mouseMoveEvent方法崩溃，Debug：'\'Mwindow\' object has no attribute \'mouse_x\''

把print(self.mouse_x,self.mouse_y)放到 mouseReleaseEvent中可以正常输出self.mouse_x,self.mouse_y。。。。
菜鸡百思不得其姐，求大佬们帮忙看看

Answer 1

报什么错