如何动态更改MDDataTable值

from kivymd.app import MDApp
from kivymd.uix.datatables import MDDataTable
from kivy.metrics import dp

class MyApp(MDApp):
    def build(self):
        # 创建MDDataTable
        table = MDDataTable(
            size_hint=(0.9, 0.6),
            use_pagination=True,
            check=True,
            column_data=[
                ("Name", dp(30)),
                ("Age", dp(30)),
                ("Gender", dp(30))
            ],
            row_data=[
                ("John Doe", "25", "Male"),
                ("Jane Smith", "30", "Female"),
                ("Bob Johnson", "40", "Male")
            ]
        )
        
        # 修改数据源的值
        table.row_data[0] = ("John Doe", "26", "Male")
        
        # 更新MDDataTable
        table.update()
        
        return table

MyApp().run()