1.单元格添加控件方式

QTableWidget的setCellWidget方法为指定单元格添加控件，例如：按钮、下拉框等，并将控件连接指定信号，实现更复杂的表格操作。

2.单元格添加控件案例

import sys
from PyQt5.QtWidgets import QApplication, QTableWidget, QTableWidgetItem, QHBoxLayout, QWidget, QPushButton, QComboBox


class QTableWidgetAddWidgetDemo(QWidget):
    def __init__(self):
        super().__init__()
        self.init_ui()

    def init_ui(self):
        self.setWindowTitle('QTableWidget添加控件演示')
        self.resize(600, 400)
        h_layout = QHBoxLayout(self)

        table = QTableWidget()
        self.table = table
        table.setRowCount(4)
        table.setColumnCount(4)
        table.setHorizontalHeaderLabels(['姓名', '性别', '操作', '删除'])

        table.setItem(0, 0, QTableWidgetItem('张三'))

        com_box = QComboBox()  # 设置下拉框
        self.com_box = com_box
        com_box.addItem('男')
        com_box.addItem('女')
        com_box.setStyleSheet('QComboBox{margin: 3px};')  # 设置qss样式
        table.setCellWidget(0, 1, com_box)  # 通过setCellWidget来为单元格添加控件,参数:(第几行, 第几列, 控件实例)

        modify = QPushButton('修改')
        modify.setStyleSheet('QPushButton{margin: 3px}')
        table.setCellWidget(0, 2, modify)
        modify.clicked.connect(self.md)

        modify = QPushButton('删除')
        modify.setStyleSheet('QPushButton{margin: 3px}')
        table.setCellWidget(0, 3, modify)
        modify.clicked.connect(self.md)

        h_layout.addWidget(table)

    def md(self):
        print(self.table.item(self.table.currentIndex().row(), 0).text())
        print(self.com_box.itemText(self.com_box.currentIndex()))


if __name__ == '__main__':
    app = QApplication(sys.argv)
    w = QTableWidgetAddWidgetDemo()
    w.show()
    app.exec()

3.运行结果