如何创建上下文菜单来删除qtableview python内部的行

创建上下文菜单来删除QTableView Python内部的行，可以通过以下步骤实现：

首先，导入必要的模块和类：

from PyQt5.QtWidgets import QApplication, QTableView, QMenu, QAction
from PyQt5.QtCore import Qt

创建一个QTableView对象并设置为主窗口的中心部件：

app = QApplication([])
table_view = QTableView()
window.setCentralWidget(table_view)

定义一个自定义的右键菜单类，并继承QMenu类：

class CustomContextMenu(QMenu):
    def __init__(self, parent=None):
        super().__init__(parent)

在自定义右键菜单类中，创建一个删除行的操作：

        self.delete_action = QAction("删除行", self)
        self.delete_action.triggered.connect(self.delete_selected_row)
        self.addAction(self.delete_action)

实现删除行的方法，该方法会获取选中的行并删除：

    def delete_selected_row(self):
        table = self.parentWidget()
        model = table.model()
        selection_model = table.selectionModel()
        selected_indexes = selection_model.selectedIndexes()

        rows = set()
        for index in selected_indexes:
            rows.add(index.row())

        for row in sorted(rows, reverse=True):
            model.removeRow(row)

为QTableView对象设置右键菜单策略，并创建一个自定义右键菜单实例并关联到QTableView对象上：

table_view.setContextMenuPolicy(Qt.CustomContextMenu)
context_menu = CustomContextMenu(table_view)
table_view.customContextMenuRequested.connect(context_menu.exec_)

完整代码示例：

from PyQt5.QtWidgets import QApplication, QMainWindow, QTableView, QMenu, QAction
from PyQt5.QtCore import Qt, QAbstractTableModel, QModelIndex

class CustomTableModel(QAbstractTableModel):
    def __init__(self, data, headers):
        super().__init__()
        self._data = data
        self._headers = headers

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

    def columnCount(self, parent=QModelIndex()):
        return len(self._headers)

    def headerData(self, section, orientation, role=Qt.DisplayRole):
        if role == Qt.DisplayRole and orientation == Qt.Horizontal:
            return self._headers[section]

    def data(self, index, role=Qt.DisplayRole):
        if role == Qt.DisplayRole:
            row = index.row()
            col = index.column()
            return self._data[row][col]

    def removeRow(self, position, parent=QModelIndex()):
        self.beginRemoveRows(parent, position, position)
        del self._data[position]
        self.endRemoveRows()

class CustomContextMenu(QMenu):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.delete_action = QAction("删除行", self)
        self.delete_action.triggered.connect(self.delete_selected_row)
        self.addAction(self.delete_action)

    def delete_selected_row(self):
        table = self.parentWidget()
        model = table.model()
        selection_model = table.selectionModel()
        selected_indexes = selection_model.selectedIndexes()

        rows = set()
        for index in selected_indexes:
            rows.add(index.row())

        for row in sorted(rows, reverse=True):
            model.removeRow(row)

if __name__ == '__main__':
    app = QApplication([])
    window = QMainWindow()
    window.setWindowTitle("QTableView 示例")
    
    # 模拟数据和表头
    data = [
        ['Alice', '25', 'Female'],
        ['Bob', '30', 'Male'],
        ['Charlie', '35', 'Male'],
        ['Diana', '28', 'Female']
    ]
    headers = ['Name', 'Age', 'Gender']

    # 创建表格模型和视图
    model = CustomTableModel(data, headers)
    table_view = QTableView()
    table_view.setModel(model)
    window.setCentralWidget(table_view)

    # 创建右键菜单
    table_view.setContextMenuPolicy(Qt.CustomContextMenu)
    context_menu = CustomContextMenu(table_view)
    table_view.customContextMenuRequested.connect(context_menu.exec_)

    window.show()
    app.exec_()

这样，当在QTableView中选中一行或多行，右键点击时会弹出自定义的上下文菜单，其中的"删除行"选项可以删除所选中的行。

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