上面的代码 错误 type object 'Qt' has no attribute 'IndexNotFound'

抱歉给出的示例代码中有一个错误。`Qt` 模块中没有 `IndexNotFound` 属性。请改为使用 `QModelIndex()` 来代替。以下是修正后的代码：

import sys
from PyQt5.QtWidgets import QApplication, QTableView, QPushButton, QVBoxLayout, QWidget
from PyQt5.QtGui import QStandardItemModel, QStandardItem, QColor, QFont
from PyQt5.QtCore import QAbstractTableModel, Qt

class ExcelTableModel(QAbstractTableModel):
    def __init__(self, data, headers, parent=None):
        super(ExcelTableModel, self).__init__(parent)
        self.data = data
        self.headers = headers

    def rowCount(self, parent=QModelIndex()):
        return len(self.data)

    def columnCount(self, parent=QModelIndex()):
        if self.data:
            return len(self.data[0])
        return 0

    def data(self, index, role=Qt.DisplayRole):
        if not index.isValid():
            return None

        row = index.row()
        col = index.column()

        if role == Qt.DisplayRole or role == Qt.EditRole:
            return str(self.data[row][col])

        if role == Qt.BackgroundRole:
            # 获取单元格的背景颜色
            return self.data[row][col].background_color

        if role == Qt.FontRole:
            # 获取单元格的字体样式
            font = QFont()
            font.setBold(self.data[row][col].bold)
            font.setItalic(self.data[row][col].italic)
            font.setUnderline(self.data[row][col].underline)
            return font

        return None

    def setData(self, index, value, role=Qt.EditRole):
        if index.isValid() and role == Qt.EditRole:
            row = index.row()
            col = index.column()
            self.data[row][col] = value
            self.dataChanged.emit(index, index)
            return True
        return False

    def insertRows(self, position, rows, parent=QModelIndex()):
        self.beginInsertRows(parent, position, position + rows - 1)
        for _ in range(rows):
            row = []
            for _ in range(self.columnCount()):
                cell = QStandardItem('')
                cell.background_color = QColor(255, 255, 0)  # 设置为黄色背景
                cell.bold = False
                cell.italic = False
                cell.underline = False
                row.append(cell)
            self.data.insert(position, row)
        self.endInsertRows()
        return True

    def removeRows(self, position, rows, parent=QModelIndex()):
        self.beginRemoveRows(parent, position, position + rows - 1)
        del self.data[position:position + rows]
        self.endRemoveRows()
        return True

    def headerData(self, section, orientation, role=Qt.DisplayRole):
        if role == Qt.DisplayRole and orientation == Qt.Horizontal:
            return self.headers[section]
        if role == Qt.DisplayRole and orientation == Qt.Vertical:
            return str(section + 1)
        return None


if __name__ == '__main__':
    app = QApplication(sys.argv)

    # 初始数据和列标题
    data = [
        [QStandardItem('Cell 1'), QStandardItem('Cell 2'), QStandardItem('Cell 3')],
        [QStandardItem('Cell 4'), QStandardItem('Cell 5'), QStandardItem('Cell 6')],
        [QStandardItem('Cell 7'), QStandardItem('Cell 8'), QStandardItem('Cell 9')]
    ]
    headers = ['Column 1', 'Column 2', 'Column 3']

    model = ExcelTableModel(data, headers)
    tableView = QTableView()
    tableView.setModel(model)

    # 插入行按钮
    insertButton = QPushButton('Insert Row')
    insertButton.clicked.connect(lambda: model.insertRows(0, 1))

    # 删除行按钮
    deleteButton = QPushButton('Delete Row')
    deleteButton.clicked.connect(lambda: model.removeRows(0, 1))

    # 创建布局并添加表格视图和按钮
    layout = QVBoxLayout()
    layout.addWidget(tableView)
    layout.addWidget(insertButton)
    layout.addWidget(deleteButton)

    # 创建窗口并设置布局
    window = QWidget()
    window.setLayout(layout)
    window.resize(400, 300)
    window.show()

    sys.exit(app.exec_())

这个修正后的代码应该可以正常运行，并且包含了插入行和删除行的功能。非常抱歉给你带来的困扰。