pyqt 不规则形状窗口显示

#coding=utf-

import sys

from PyQt5.QtCore import Qt

from PyQt5.QtWidgets import QWidget, QApplication

from PyQt5.QtGui import QPixmap, QPainter, QBitmap, QCursor

import PyQt5.QtCore as QtCore

class PixWindow(QWidget):  # 不规则窗体

    def __init__(self):

        super().__init__()

        self.pix = QPixmap('0.png')  # 蒙版

        windowWidth =

        windowHeight =

        self.resize(windowWidth, windowHeight)

        self.pix = self.pix.scaled(int(windowWidth), int(windowHeight))

        self.setMask(self.pix.mask())

        self.setWindowFlags(Qt.FramelessWindowHint | QtCore.Qt.WindowStaysOnTopHint)  # 设置无边框和置顶窗口样式

    def paintEvent(self, event):  # 绘制窗口

        paint = QPainter(self)

        paint.drawPixmap(, , self.pix.width(), self.pix.height(), self.pix)

if __name__ == '__main__':

    app = QApplication(sys.argv)

    win = PixWindow()

    win.show()

    sys.exit(app.exec_())