Python PyQt5 QTreeView设置行背景颜色

from PyQt5.QtWidgets import QApplication, QTreeView, QStyledItemDelegate, QStyleOptionViewItem
from PyQt5.QtGui import QColor, QPainter
from PyQt5.QtCore import Qt

class CustomDelegate(QStyledItemDelegate):
    def paint(self, painter, option, index):
        # 获取行号
        row = index.row()
        # 设置奇偶行的背景颜色
        if row % 2 == 0:
            option.backgroundBrush = QColor(240, 240, 240)
        else:
            option.backgroundBrush = QColor(255, 255, 255)
        # 调用父类的绘制方法
        super().paint(painter, option, index)

app = QApplication([])
treeView = QTreeView()
model = QStandardItemModel()
treeView.setModel(model)

# 设置代理
delegate = CustomDelegate()
treeView.setItemDelegate(delegate)

# 添加数据
rootItem = model.invisibleRootItem()
parentItem = QStandardItem("Parent Item")
rootItem.appendRow(parentItem)
childItem1 = QStandardItem("Child Item 1")
parentItem.appendRow(childItem1)
childItem2 = QStandardItem("Child Item 2")
parentItem.appendRow(childItem2)

treeView.show()
app.exec_()