python pyqt5 qss样式设置

-- coding: utf-8 --

'''
【简介】
QSS样式

'''

from PyQt5.QtWidgets import *
import sys

class WindowDemo(QWidget):
def init(self):
super().init()

    btn1 = QPushButton(self)
    btn1.setText('按钮1')

    btn2 = QPushButton(self)
    btn2.setText('按钮2')

    vbox = QVBoxLayout()
    vbox.addWidget(btn1)
    vbox.addWidget(btn2)
    self.setLayout(vbox)
    self.setWindowTitle("QSS样式")

if name == "main":
app = QApplication(sys.argv)
win = WindowDemo()
qssStyle = '''
QPushButton {
background-color: red
}

    '''
win.setStyleSheet(qssStyle)
win.show()
sys.exit(app.exec_())