如何在kivy app的KV文件中显示来自Python的变量值

Question

我正在尝试将函数 label_title 中的变量 archon2_channel 显示为 MDLabel 文本值。我曾尝试使用 StringProperty(var_name)，也通过全局变量，但运气不佳...感谢任何有助于解决问题的想法和/或链接。

我将此功能放在应用程序中 class:

Python:

class DemoApp(MDApp):

    def build(self):
        self.theme_cls.primary_palette = "Green"
        self.theme_cls.theme_style = "Dark"
        self.standard_increment = STANDARD_INCREMENT
        self.load_all_kv_files(os.path.join(self.directory, "libs", "uix", "kv",))
        self.load_all_kv_files(os.path.join(self.directory, "libs", "uix", "uix_drawer", "kv"))
        self.root_widget = RootWidget()
        self.screen_manager = self.root_widget.ids.screen_manager
        self.nav_drawer = self.root_widget.ids.navigation_drawer
        return self.root_widget

    def label_title(self):
        url_archon2 = "http://weburrl"
        response_archon2 = requests.request("GET", url_archon2, headers=headers, data = "")
        archon2_channel = response_archon2.json()['items']['contentChannel']
        archon2_ticker = response_archon2.json()['items']['messageScheduleName']
        print(archon2_channel)
        print(archon2_ticker)
        return StringProperty(archon2_ticker)

DemoApp().run()

KV 文件：

MDLabel
    text: app.archon2_channel
    size_hint_y: None
    height: self.texture_size[1]
    padding: 0, "20dp"
    halign: "center"
    theme_text_color: "Primary"

Answer 1

嗯，它实际上刚刚发生了 )) 这就是我所做的，我从函数 label_title() 中删除了代码并将其放入 class DemoApp(MDApp) 级别：

class DemoApp(MDApp):
    url_archon2 = "web url"
    r_dev_info_archon2 = requests.request("GET", url_archon2, headers=headers, data="")
    ch_numb_archon2 = r_dev_info_archon2.json()['items']['contentChannel']

在 KV 文件中：

MDLabel
    text: app.ch_numb_archon2
    size_hint_y: None
    height: self.texture_size[1]
    padding: 0, "20dp"
    halign: "center"
    theme_text_color: "Primary"

比我想象的要容易！

如何在kivy app的KV文件中显示来自Python的变量值

How to display variable value from Python in KV file in kivy app

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