qtableview实现粘贴复制

QTableView实现粘贴复制可以通过以下步骤实现：

1. 选中需要复制的单元格，按下Ctrl+C进行复制。

2. 选中需要粘贴的单元格，按下Ctrl+V进行粘贴。

3. 如果需要自定义复制和粘贴的操作，可以通过重写QTableView的keyPressEvent()函数来实现。例如，以下代码实现了在QTableView中按下Ctrl+C复制选中的单元格，并在按下Ctrl+V时将剪贴板中的内容粘贴到选中的单元格中：

from PyQt5.QtWidgets import QTableView, QAbstractItemView, QClipboard, QApplication
from PyQt5.QtCore import Qt

class MyTableView(QTableView):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.setEditTriggers(QAbstractItemView.NoEditTriggers) # 禁止编辑
        self.setContextMenuPolicy(Qt.CustomContextMenu) # 设置右键菜单策略
        self.customContextMenuRequested.connect(self.showContextMenu) # 显示右键菜单

    def keyPressEvent(self, event):
        if event.matches(QKeySequence.Copy):
            self.copy()
        elif event.matches(QKeySequence.Paste):
            self.paste()
        else:
            super().keyPressEvent(event)

    def copy(self):
        selection = self.selectionModel().selection()
        if selection:
            indexes = selection.indexes()
            if indexes:
                rows = sorted(index.row() for index in indexes)
                columns = sorted(index.column() for index in indexes)
                rowcount = rows[-1] - rows[0] + 1
                colcount = columns[-1] - columns[0] + 1
                table = [[''] * colcount for _ in range(rowcount)]
                for index in indexes:
                    row = index.row() - rows[0]
                    column = index.column() - columns[0]
                    table[row][column] = index.data()
                text = '\n'.join('\t'.join(row) for row in table)
                QApplication.clipboard().setText(text)

    def paste(self):
        selection = self.selectionModel().selection()
        if selection:
            indexes = selection.indexes()
            if indexes:
                rows = sorted(index.row() for index in indexes)
                columns = sorted(index.column() for index in indexes)
                rowcount = rows[-1] - rows[0] + 1
                colcount = columns[-1] - columns[0] + 1
                text = QApplication.clipboard().text()
                table = [row.split('\t') for row in text.split('\n')]
                for row in range(min(rowcount, len(table))):
                    for column in range(min(colcount, len(table[row]))):
                        index = self.model().index(rows[0] + row, columns[0] + column)
                        self.model().setData(index, table[row][column])

    def showContextMenu(self, pos):
        menu = self.createStandardContextMenu()
        menu.exec_(self.viewport().mapToGlobal(pos))