来自kivy的__init__函数警告已弃用

Question

我正在尝试使用python 3.7在kivy中构建用户界面，并且收到一堆警告，但我不知道为什么。我以前从未使用过kivy，现在我只是想在添加功能之前先构建布局。现在看来这不是问题，但我不想以后再发现这是我应该早些处理的事情。

我收到6条警告，所有警告均与以下内容相似：

[WARNING] [Call to deprecated function __init__ in C]\Users\shanley\AppData\Local\Programs\Python\Python37\lib\site-packages\kivy\adapters\adapter.py line 111.Called from C:\Users\shanley\AppData\Local\Programs\Python\Python37\lib\site-packages\kivy\adapters\simplelistadapter.py line 55 by __init__().

到目前为止，这是我的代码。 interface.py：

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.properties import ObjectProperty
from kivy.uix.listview import ListItemButton


class MessageListButton(ListItemButton):
    pass


class InterfaceBoxLayout(BoxLayout):

    message_list = ObjectProperty()

    def connect(self):
        pass

    def start_trace(self, *args):
        pass

    def message_callback(self):
        pass

    def display_message(self):
        pass


class InterfaceApp(App):
    def build(self):
        return InterfaceBoxLayout()


if __name__ == "__main__":
    InterfaceApp().run()

和interface.kv：

# Reference interface.py
#: import main interface
#: import ListAdapter kivy.adapters.listadapter.ListAdapter
#: import ListItemButton kivy.uix.listview.ListItemButton


<InterfaceBoxLayout>:
    orientation: "vertical"
    message_list: message_list_view
    padding: 10
    spacing: 10

    BoxLayout:
        orientation: "horizontal"
        size_hint_y: None
        height: "40dp"

        Label:
            text: "Q-Logic 3 Trace"
        Label:
            text: "Interface Selection"
        Button:
            text: "Connect"
            on_press: root.connect()

    BoxLayout:
        orientation: "horizontal"
        size_hint_y: None
        height: "40dp"

        Button:
            text: "Start Trace"
            on_press: root.start_trace()

    # Define starting data and point to the ListItemButton
    # in the Python code

    ListView:
        id: message_list_view
        adapter:
            ListAdapter(data=["Starting Data"], cls=main.MessageListButton)

任何建设性的反馈将不胜感激！