在QGroupBox PyQT中对齐居中元素

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QGroupBox, QHBoxLayout, QPushButton

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()

        self.setWindowTitle("QGroupBox PyQT Example")
        self.setGeometry(100, 100, 300, 200)

        self.initUI()

    def initUI(self):
        groupBox = QGroupBox("Align Center")
        hboxLayout = QHBoxLayout()

        button1 = QPushButton("Button 1")
        button2 = QPushButton("Button 2")

        hboxLayout.addWidget(button1)
        hboxLayout.addWidget(button2)

        hboxLayout.addStretch(1)  # 添加伸缩项，使元素居中对齐

        groupBox.setLayout(hboxLayout)

        self.setCentralWidget(groupBox)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    mainWindow = MainWindow()
    mainWindow.show()
    sys.exit(app.exec_())