加载多个文件时出错？

Question

错误

[INFO   ] [Base        ] Leaving application in progress...
[WARNING] [Lang        ] The file e:\school_proj\final_with_settings\layout.kv is loaded multiples times, you might have unwanted behaviors.
[INFO   ] [Base        ] Start application main loop
False
True
UPDATED
[INFO   ] [Base        ] Leaving application in progress...

所以，我接受了一些用户输入然后进行更改，我必须重新启动应用程序。

同样，我在互联网上找到了这段代码：

    def restart(self):
        self.root.clear_widgets()
        self.stop()
        return StonkkApp().run()

这位于 MDApp class

.py代码

class StonkkApp(MDApp):
    
    def build(self):
        self.icon = f'{cur_file_path}/stonkss.png'
        screen = Builder.load_file('layout.kv')
        self.theme_cls.theme_style = theme
        self.theme_cls.primary_palette = 'Gray'
        return screen
    
    def restart(self):
        self.root.clear_widgets()
        self.stop()
        return StonkkApp().run()

然后报错

Full Traceback:
[INFO   ] [deps        ] Successfully imported "kivy_deps.gstreamer" 0.3.2
[INFO   ] [deps        ] Successfully imported "kivy_deps.angle" 0.3.0
[INFO   ] [deps        ] Successfully imported "kivy_deps.glew" 0.3.0
[INFO   ] [deps        ] Successfully imported "kivy_deps.sdl2" 0.3.1
[INFO   ] [Kivy        ] v2.1.0.dev0, git-143ba31, 20210630
[INFO   ] [Python      ] v3.9.6 (tags/v3.9.6:db3ff76, Jun 28 2021, 15:26:21) [MSC v.1929 64 bit (AMD64)]
[INFO   ] [Logger      ] Purge log fired. Processing...
[INFO   ] [Logger      ] Purge finished!
[INFO   ] [Factory     ] 189 symbols loaded
[INFO   ] [Image       ] Providers: img_tex, img_dds, img_sdl2, img_pil (img_ffpyplayer ignored)
[INFO   ] [Text        ] Provider: sdl2
[INFO   ] [Window      ] Provider: sdl2
[INFO   ] [GL          ] Using the "OpenGL" graphics system
[INFO   ] [GL          ] GLEW initialization succeeded
[INFO   ] [GL          ] Backend used <glew>
[INFO   ] [GL          ] OpenGL version <b'4.5.13399 Compatibility Profile Context 
15.201.1151.1008'>
[INFO   ] [GL          ] OpenGL vendor <b'ATI Technologies Inc.'>
[INFO   ] [GL          ] OpenGL parsed version: 4, 5
[INFO   ] [GL          ] Shading version <b'4.40'>
[INFO   ] [GL          ] Texture max size <16384>[INFO   ] [GL          ] Texture max units <18>
[INFO   ] [Window      ] auto add sdl2 input provider
[INFO   ] [Window      ] virtual keyboard not allowed, single mode, not docked     
[INFO   ] [GL          ] NPOT texture support is available
[INFO   ] [Base        ] Start application main loop
False
True
UPDATED
Saving changes.
current color and type of plot is , . app mode is Light
[INFO   ] [Base        ] Leaving application in progress...
[WARNING] [Lang        ] The file e:\school_proj\final_with_settings\layout.kv is loaded multiples times, you might have unwanted behaviors.
[INFO   ] [Base        ] Start application main loop
False
True
UPDATED
[INFO   ] [Base        ] Leaving application in progress...

这个错误是在我启动运行重启代码后出现的。

解决方案：

Builder.unload_file('Layout.kv')

只需添加到 restart() 函数的开头。

Answer 1

当您重新启动 App 时，build() 方法正在重新加载行中的 kv 文件：

screen = Builder.load_file('layout.kv')

有关如何防止加载 kv 文件两次的想法，请参阅。

加载多个文件时出错？

getting an error of loading multiple files?

python

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