如何在QTableWidget中设置特定网格线的颜色？

from PyQt5.QtWidgets import QApplication, QTableWidget, QTableWidgetItem, QStyleOptionViewItem, QStyle
from PyQt5.QtGui import QColor, QPainter
from PyQt5.QtCore import Qt

class CustomDelegate(QStyledItemDelegate):
    def paint(self, painter, option, index):
        # 绘制单元格内容
        QStyledItemDelegate.paint(self, painter, option, index)
        
        # 获取单元格的行和列
        row = index.row()
        column = index.column()
        
        # 设置特定网格线的颜色
        if row == 0 and column == 0:
            painter.save()
            painter.setPen(QColor(255, 0, 0))  # 设置红色
            painter.drawLine(option.rect.topLeft(), option.rect.topRight())
            painter.drawLine(option.rect.topLeft(), option.rect.bottomLeft())
            painter.restore()

if __name__ == '__main__':
    app = QApplication([])
    tableWidget = QTableWidget(3, 3)
    delegate = CustomDelegate()
    tableWidget.setItemDelegate(delegate)
    
    # 添加表格内容
    for row in range(3):
        for column in range(3):
            item = QTableWidgetItem(f'({row}, {column})')
            tableWidget.setItem(row, column, item)
    
    tableWidget.show()
    app.exec_()