python - 如何通过单击python中的按钮和MDNavigationDrawer来kivyMD数据表

Question

当我按下按钮时出现错误AttributeError: 'MDDataTable' object has no attribute 'open'

我希望通过打开 MDNavigationDrawer 菜单并按 MDlist 中的 OneLineIconListItem 来显示 MDDatatable，但出现上述错误。如果可能，请提供帮助

如果有人可以在 kivyMD 中编写一个程序，通过点击下拉菜单中的一个项目来调用数据表，我将非常感激。.py

from kivymd.app import MDApp
from kivy.lang import Builder
from kivy.core.window import Window
from kivy.uix.screenmanager import Screen,ScreenManager
from kivy.properties import ObjectProperty
from kivymd.uix.datatables import MDDataTable
from kivy.metrics import dp


class MenuScreen(Screen):
    pass
class ProfileScreen(Screen):
    pass
sm=ScreenManager()
sm.add_widget(MenuScreen(name='menu'))
sm.add_widget(ProfileScreen(name='profile'))

class DemoApp(MDApp):
    tables = ObjectProperty(None)
    def table(self):
        self.tables = MDDataTable(size_hint=(0.9, 0.6),
                                  use_pagination=True,
                                  column_data=[
                                      ("No.", dp(30)),
                                      ("Column 1", dp(30)),
                                      ("Column 2", dp(30)),
                                      ("Column 3", dp(30)),
                                      ("Column 4", dp(30)),
                                      ("Column 5", dp(30)),
                                  ],
                                  row_data=[
                                      (f"{i + 1}", "1", "2", "3", "4", "5") for i in range(50)
                                  ],
                                  )
        self.tables.open()


    def build(self):


        return Builder.load_file("mainApp.kv")


DemoApp().run()

.kv

#:import arabic_reshaper arabic_reshaper
#:import get_display bidi.algorithm.get_display
ScreenManager:
    MenuScreen:
    ProfileScreen:
<MenuScreen>:
    name:"menu"
    MDNavigationLayout:
        ScreenManager:
            MDScreen:
                BoxLayout:
                    orientation: 'vertical'
                    MDToolbar:
                        title: "Navigation Drawer"
                        elevation: 10
                        left_action_items: [['menu', lambda x: nav_drawer.set_state("open")]]
                        size_hint:(1,.15)
                    BoxLayout:
                        pos_hint:{"center_x":0.5,"center_y":0.5}
                        orientation: 'vertical'



                        size_hint:(1,1)
                        MDFloatLayout:
                            size:root.width , root.height
                            padding:20
                            spacing:20


                            MDRoundFlatIconButton:
                                icon: "android"
                                text: get_display(arabic_reshaper.reshape('ناودانی'))
                                pos_hint:{'center_x':0.3,'center_y':0.15}
                            MDRoundFlatIconButton:
                                icon: "android"
                                text: get_display(arabic_reshaper.reshape('نبشی'))
                                pos_hint:{'center_x':0.7,'center_y':0.15}
                            MDRoundFlatIconButton:
                                icon: "android"
                                text: get_display(arabic_reshaper.reshape('پروفیل'))
                                pos_hint:{'center_x':0.3,'center_y':0.5}
                            MDRoundFlatIconButton:
                                icon: "android"
                                text: get_display(arabic_reshaper.reshape('ورق'))
                                pos_hint:{'center_x':0.7,'center_y':0.5}
                                on_press: app.table()
                            MDRoundFlatIconButton:
                                icon: "android"
                                text: get_display(arabic_reshaper.reshape('تیرآهن'))
                                pos_hint:{'center_x':0.30,'center_y':0.85}
                            MDRoundFlatIconButton:
                                icon: "android"
                                text: get_display(arabic_reshaper.reshape('میلگرد'))
                                pos_hint:{'center_x':0.7,'center_y':0.85}











        MDNavigationDrawer:
            id: nav_drawer
            BoxLayout:
                orientation:'vertical'
                spacing:"8dp"
                padding:"8dp"
                Image:
                    source: "images/treee.jpg"
                MDLabel:
                    text:'AliReza'
                    font_style:'Subtitle1'
                    size_hint_y:None
                    height:self.texture_size[1]
                MDLabel:
                    text:'[e-mail]'
                    font_style:'Caption'
                    size_hint_y:None
                    height:self.texture_size[1]
                ScrollView:
                    MDList:
                        OneLineIconListItem:
                            text: get_display(arabic_reshaper.reshape('قیمت ها'))
                            on_release:root.manager.current='profile'
                            IconLeftWidget:
                                icon: "cash-multiple"


                        OneLineIconListItem:
                            text: get_display(arabic_reshaper.reshape('تماس با ما'))

                            IconLeftWidget:
                                icon: "phone-plus"
<ProfileScreen>:
    name:'profile'
    MDLabel:
        text:"welcome"
        halign:'center'
    MDRectangleFlatButton:
        text: get_display(arabic_reshaper.reshape('بازگشت'))

        pos_hint:{"center_x":0.5,"center_y":0.4}
        on_press:
            root.manager.current='menu'
            root.manager.transition.direction="right"

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