我有一个示例代码，它的工作很好。但在这段代码中，滚动视图和网格布局是在KV文件中创建的。我有一个滚动错误的问题，所以我想在纯Python中创建它们。
有350个boxlayout，它们是在Scrollview中创建的，每个boxlayout有5个小部件（按钮标签等），所以这会导致Scrollview在清除屏幕和重新创建结果时出现一些错误。80个boxlayout没有问题，但它们是动态创建的，有时Scrollview中会有300多个boxlayout。
我想如果我可以创建滚动视图和网格布局，我可以解决这个问题。所以我需要你的帮助。
我怎么能做到这一点.测试代码：

• • PY文件：**

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.label import Label
from kivy.metrics import dp
from kivy.uix.behaviors import ButtonBehavior
from kivy.clock import Clock, mainthread
import json
import threading

class Test(BoxLayout):

    def __init__(self, **kwargs):
        super(Test, self).__init__(**kwargs)
 
        self.data = self.datas()

    # Homepage Screen
    def homepage(self, screenmanager):        
        
        screenmanager.current = 'homepage_screen'
        Clock.schedule_once(self.clear_widgets)

    # Clear Widgets
    def clear_widgets(self, *args):

        for child in [child for child in self.ids.gridsonuc.children]:
            self.ids.gridsonuc.remove_widget(child)      

    #Second screen
    def second(self,screenmanager):
        
        screenmanager.current = 'second_screen'

        Clock.schedule_once(self.clear_widgets)
        Clock.schedule_once(self.datas) # Before calculation, each time app pulls data again, but Kivy Does Not Update The Refreshed Data in The Screen!    
        Clock.schedule_once(self.calculate)

        # or, if i can use threading system as well but this time i must add @mainthread above def calculate(self, *args): to make code work.
        # in both scenario, Kivy Does Not Update The Refreshed Data in The Screen While APP is Running.

        # mythread1 = threading.Thread(target=self.clear_widgets) 
        # mythread1.start()
        # mythread2 = threading.Thread(target=self.datas) 
        # mythread2.start()
        # mythread3 = threading.Thread(target=self.calculate) 
        # mythread3.start()

    # Calculation
    #@mainthread
    def calculate(self, *args):        

        
        for i in self.data['home']:           

            box = BoxLayout(size_hint_y = None, height = dp(50))
            hometeams = Label(text = f'{[i]}', font_name = 'Roboto', font_size = dp(15), size_hint = (0.225, 1), halign='center', bold = True )
            box.add_widget(hometeams)
            self.ids.gridsonuc.add_widget(box)

    def datas(self, *args):           
        
        # PLEASE CHANGE THE LOCATION!!!!!!!!!!!!!!!!!
        with open ("C:\\Users\\Messi\\Desktop\\Python\\Projects\\Football Tips\\Kivy\\Testing Bugs\\Test1\\data.json", "r") as dosya:
        
            dataApi = json.load(dosya)      
            print('datas updated')
            self.data = dataApi  # update the self.data
        return dataApi     
  
class TestApp(App):
    def build(self): 
        return Test()

if __name__ == '__main__':
    TestApp().run()

• • KV文件：**

#:import NoTransition kivy.uix.screenmanager.NoTransition
<Test>:
    ScreenManager:
        transition: NoTransition()
        id: sm
        size: root.width, root.height
        Screen:
            name: 'homepage_screen'            
            BoxLayout:
                size_hint: 1, 0.10
                Button:
                    text: 'Calculate'
                    id: underOver_button_homepage
                    on_press: root.second(sm)     
                    background_color: 0, 0, 0, 0                                  
        Screen:
            name: 'second_screen'
            BoxLayout:
                spacing: '20dp'
                orientation: 'vertical'    
                BoxLayout:
                    size_hint: 1, 0.80
                    ScrollView:
                        scroll_type: ['bars', 'content']
                        bar_margin: '5dp'
                        bar_color: 1, 0.4, 0.769, 1 
                        bar_width: '5dp'
                        bar_inactive_color: 1, 0.4, 0.769, 1
                        GridLayout:                            
                            id: gridsonuc
                            cols: 1
                            spacing: '50dp'
                            size_hint_y: None
                            height: self.minimum_height        
                BoxLayout:
                    size_hint: 1, 0.10
                    Button:
                        text: 'Home'
                        id: home_button_underOver
                        on_press: root.homepage(sm)
                        background_color: 0, 0, 0, 0

• • 例如：**

我不想在KV文件中使用此结构

BoxLayout:
    size_hint: 1, 0.80
    ScrollView:
        scroll_type: ['bars', 'content']
        bar_margin: '5dp'
        bar_color: 1, 0.4, 0.769, 1 
        bar_width: '5dp'
        bar_inactive_color: 1, 0.4, 0.769, 1
        GridLayout:                            
            id: gridsonuc
            cols: 1
            spacing: '50dp'
            size_hint_y: None
            height: self.minimum_height

• • 我的目标：**

BoxLayout:
    size_hint: 1, 0.80
    Newscroll: # New Scrollview Class and have also Gridlayout in it

GridLayout和Scrollview必须有相同的设置，我想使用如下。我认为scroll_type：["条形图"，"内容"]，条形图边距：'5dp'，条颜色：1、0.4、0.769、1，条形宽度：'5dp'，条_非活动_颜色：1、0.4、0.769、1列：1、间距：'50dp'，大小_提示_y：无，身高：self. minimum_height应使用Python编写
还有一个新的clear def（）用于清理完整的scrollview类，当在Pure Python中清除和创建Scrollview时，会动态创建，这样我就可以修复我的Scroll bug问题。
谢谢你的帮助。我希望有一天我能达到一个可以帮助其他人的水平。