Asynchronous http request in kivy

main.py

import asyncio

import httpx
from kivy.animation import Animation
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.button import Button
from kivy.uix.label import Label


class AsyncRequestsApp(App):
    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        self.data = []
        self.loading = False

    def on_start(self):
        anim = Animation(font_size=10) + Animation(font_size=30)
        anim.repeat = True
        anim.start(self.anim_widget)

    def build(self):
        self.layout = BoxLayout(orientation="vertical")

        self.anim_widget = Label(
            text="Animated label to check whether it is blocking the UI or not",
            font_size=10,
        )
        self.layout.add_widget(self.anim_widget)

        self.message_label = Label(text="Press below", size_hint=(1, 0.2))
        self.layout.add_widget(self.message_label)

        self.load_button = Button(text="Load Data", size_hint=(1, 0.2))
        self.load_button.bind(on_press=self.fetch_data)
        self.layout.add_widget(self.load_button)

        return self.layout

    def fetch_data(self, instance):
        if not self.loading:
            self.loading = True
            self.message_label.text = "Loading Data..."
            asyncio.ensure_future(self.get_data_from_api())

    async def get_data_from_api(self):
        try:
            async with httpx.AsyncClient() as client:
                res = await client.get("https://jsonplaceholder.typicode.com/posts")
                self.data = res.json()

            await asyncio.sleep(2)

            self.loading = False
            self.message_label.text = "Data Loaded!"
        except Exception as e:
            self.loading = False
            self.message_label.text = f"Error: {str(e)}"
            print(f"Error: {str(e)}")


if __name__ == "__main__":
    loop = asyncio.get_event_loop()
    loop.run_until_complete(AsyncRequestsApp().async_run(async_lib="asyncio"))
    loop.close()