在PyQt5中美观地分组按钮

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout, QGroupBox, QPushButton

class Example(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.setWindowTitle('美观的分组按钮')
        self.setGeometry(300, 300, 300, 200)

        vbox = QVBoxLayout()

        groupbox = QGroupBox('分组框')
        vbox.addWidget(groupbox)

        button1 = QPushButton('按钮1')
        button2 = QPushButton('按钮2')

        vbox_inside = QVBoxLayout()
        vbox_inside.addWidget(button1)
        vbox_inside.addWidget(button2)
        vbox_inside.addStretch(1)

        groupbox.setLayout(vbox_inside)

        self.setLayout(vbox)
        self.show()

if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())