如何在PyQt环境中为同一小工具设置两个滚动条(垂直和水平)？

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QScrollArea, QVBoxLayout, QScrollBar

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

    def initUI(self):
        # 创建一个QScrollArea对象
        scrollArea = QScrollArea(self)
        scrollArea.setWidgetResizable(True)

        # 创建一个小工具
        widget = QWidget()
        layout = QVBoxLayout(widget)
        for i in range(100):
            layout.addWidget(QPushButton(f"Button {i}"))

        # 将小工具设置为QScrollArea的子控件
        scrollArea.setWidget(widget)

        # 创建垂直滚动条和水平滚动条
        verticalScrollBar = QScrollBar()
        horizontalScrollBar = QScrollBar()
        scrollArea.setVerticalScrollBar(verticalScrollBar)
        scrollArea.setHorizontalScrollBar(horizontalScrollBar)

        # 设置布局
        layout = QVBoxLayout(self)
        layout.addWidget(scrollArea)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    widget = MyWidget()
    widget.show()
    sys.exit(app.exec_())