如何在 kivy 应用程序的 KV 文件中显示来自 Python 的变量值

Question

我试图将函数label_title中的变量archon2_channel显示为MDLabel文本值。 我尝试使用StringProperty(var_name) ，也通过全局变量，没有运气......感谢任何可以帮助解决它的想法和/或链接。

我将此函数放在 App 类中：

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，它实际上只是发生了)) 这就是我所做的，我从函数 label_title() 中删除了代码并将其放在类 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！