Reflex

python3 -m venv .venv
source .venv/bin/activate
pip3 install reflex
reflex init
reflex run

sample.py

import reflex as rx


class State(rx.State):
    count: int = 0

    def increment(self):
        self.count += 1

    def decrement(self):
        self.count -= 1


def index():
    return rx.hstack(
        rx.button(
            "Decrement",
            color_scheme="ruby",
            on_click=State.decrement,
        ),
        rx.heading(State.count, font_size="2em"),
        rx.button(
            "Increment",
            color_scheme="grass",
            on_click=State.increment,
        ),
        spacing="4",
    )


app = rx.App()
app.add_page(index)

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