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pythonやkivyを使用して別のクラスのラベル/ IDにアクセスし、以下のエラーを回避するにはどうすればよいですか？ 私は他の投稿を検索しましたが、私はrootの方が別のクラスを参照することができないことを発見しました... Hower、私はそれを行うための他の方法を知らない。あなたが私を助けてくれることを願います。 ありがとうございます。画面サイズ設定Kivy、python：ルートクラス（FaceRecApp）から外部/子クラスにアクセスする方法？
FaceRec.py
ライブラリ
from kivy.app import App
from kivy.uix.screenmanager import ScreenManager,Screen
from kivy.uix.widget import Widget
from kivy.uix.label import Label
from kivy.uix.settings import SettingsWithSidebar
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.actionbar import ActionBar
from kivy.logger import Logger
from kivy.config import Config
Config.set('graphics', 'width', '850')
Config.set('graphics', 'height', '850')
のホームスクリーンクラス
class ScreenManagement(ScreenManager):
pass
class HomeScreen(Screen):
pass
class HomeActionBar(ActionBar):
pass
class TitleLabel(Label):
pass
class StatusBoxLayout(BoxLayout):
pass
class ErrorsBoxLayout(BoxLayout):
pass
メインクラス
class FaceRecApp(App):
def build(self):
root = HomeScreen()
Logger.info('FaceRec.py: FaceRec.kv loaded')
self.settings_cls = MySettingsWithSidebar
Logger.info('FaceRec.py: MySettingsWithSidebar loaded')
status = root.ids.StatusBoxLayout.status
status.font_size = float(self.config.get('General', 'font_size'))
label = root.ids.label
label.font_size = float(self.config.get('General', 'font_size'))
return root
def build_config(self, config):
config.setdefaults('General', {'text': 'Default Hello','font_size': 20})
def build_settings(self, settings):
settings.add_json_panel('General', self.config, 'Settings.json')
def on_config_change(self, config, section, key, value):
Logger.info("FaceRec.py: App.on_config_change: {0}, {1}, {2}, {3}".format(config, section, key, value))
if section == "General":
if key == "text":
self.root.ids.label.text = value
elif key == 'font_size':
self.root.ids.label.font_size = float(value)
self.root.ids.StatusBoxLayout.status = float(value)
def close_settings(self, settings):
Logger.info("FaceRec.py: App.close_settings: {0}".format(settings))
super(FaceRecApp, self).close_settings(settings)
サイドバーの設定
class MySettingsWithSidebar(SettingsWithSidebar):
def on_close(self):
Logger.info('FaceRec.py: MySettingsWithSidebar.on_close')
def on_config_change(self, config, section, key, value):
Logger.info(
"FaceRec.py: MySettingsWithSidebar.on_config_change: "
"{0}, {1}, {2}, {3}".format(config, section, key, value))
実行
if __name__ == '__main__':
FaceRecApp().run()
FaceRec.kv
ScreenManagement:
HomeScreen:
<HomeActionBar>:
id: HomeActionBar
pos_hint: {'bottom':0}
ActionView:
use_separator: True
ActionPrevious:
title: 'Home'
with_previous: False
ActionOverflow:
ActionButton:
text: 'Settings'
icon: 'settings.png'
background_down: 'settings.png'
on_release:
app.open_settings()
<TitleLabel>:
id: TitleLabel
text: '[b]FaceRec[/b] - [i]The Face Recognition Project[/i]'
color: 0.0,0.3,1,1
markup: True
font_size: 38
<StatusBoxLayout>:
orientation: 'horizontal'
#padding: 100
Label:
id: status
text: 'Status: '
font_size: 20
Label:
id: status_value
text: 'Error'
font_size: 20
color: 1,0,0,1
<ErrorsBoxLayout>:
id: ErrorsBoxLayout
orientation: 'horizontal'
#padding: 100
Label:
id: errors
text: 'Errors No: '
font_size: 20
Label:
id: errors_value
text: '...'
font_size: 20
<HomeScreen>:
id: HomeScreen
BoxLayout:
orientation: 'vertical'
HomeActionBar:
TitleLabel:
BoxLayout:
cols: 2
orientation: 'vertical'
StatusBoxLayout:
ErrorsBoxLayout:
Label:
id: label
text: 'Does it run?'
Settings.json
[
{
"type": "string",
"title": "Label caption",
"desc": "Choose the text that appears in the label",
"section": "General",
"key": "text"
},
{
"type": "numeric",
"title": "Label font size",
"desc": "Choose the font size the label",
"section": "General",
"key": "font_size"
}
]
私はラベル変数へのアクセスを試みた（FaceRecApp、構築およびon_config_change機能）とプログラムが正常に実行されました。設定でラベルのフォントサイズを変更すると、ホームスクリーンに変更が適用されました。 ）（ビルドで
：その後、私は次のコード行を追加しました
status = root.ids.StatusBoxLayout.status
status.font_size = float(self.config.get('General', 'font_size'))
とon_config_changeに（）：
self.root.ids.StatusBoxLayout.status = float(value)
結果がエラーとなっている：
[INFO ] [Logger ] Record log in C:\***\.kivy\logs\kivy_17-04-17_109.txt
[INFO ] [Kivy ] v1.9.1
[INFO ] [Python ] v2.7.13 (v2.7.13:a06454b1afa1, Dec 17 2016, 20:53:40) [MSC v.1500 64 bit (AMD64)]
[INFO ] [Factory ] 179 symbols loaded
[INFO ] [Image ] Providers: img_tex, img_dds, img_gif, img_sdl2, img_pil (img_ffpyplayer ignored)
[INFO ] [Text ] Provider: sdl2
[INFO ] [OSC ] using <thread> for socket
[INFO ] [Window ] Provider: sdl2
[INFO ] [GL ] GLEW initialization succeeded
[INFO ] [GL ] OpenGL version <4.5.0 NVIDIA 376.53>
[INFO ] [GL ] OpenGL vendor <NVIDIA Corporation>
[INFO ] [GL ] OpenGL renderer <GeForce ***/PCIe/SSE2>
[INFO ] [GL ] OpenGL parsed version: 4, 5
[INFO ] [GL ] Shading version <4.50 NVIDIA>
[INFO ] [GL ] Texture max size <16384>
[INFO ] [GL ] Texture max units <32>
[INFO ] [Window ] auto add sdl2 input provider
[INFO ] [Window ] virtual keyboard not allowed, single mode, not docked
[INFO ] [FaceRec.py ] FaceRec.kv loaded
[INFO ] [FaceRec.py ] MySettingsWithSidebar loaded
Traceback (most recent call last):
File "C:/***/PycharmProjects/face_recognition_2/FaceRec.py", line 114, in <module>
FaceRecApp().run()
File "C:\Python27\lib\site-packages\kivy\app.py", line 802, in run
root = self.build()
File "C:/***/PycharmProjects/face_recognition_2/FaceRec.py", line 65, in build
status = root.ids.StatusBoxLayout.status
File "kivy\properties.pyx", line 757, in kivy.properties.ObservableDict.__getattr__ (kivy\properties.c:11882)
AttributeError: 'super' object has no attribute '__getattr__'
Process finished with exit code 1
私はすでにこの投稿（および他の多くの記事）を読んでいます： How to access id/widget of different class from a kivy file (.kv)? 私のプログラムはまだ実行されていません。
また、ご支援いただきありがとうございます。