Introduction
Reflex is a library to build full-stack web apps in pure Python.
Key features:
- Pure Python - Write your app's frontend and backend all in Python, no need to learn Javascript.
- Full Flexibility - Reflex is easy to get started with, but can also scale to complex apps.
See our architecture page to learn how Reflex works under the hood.
⚙️ Installation
Important: We strongly recommend using a virtual environment to ensure the reflex command is available in your PATH.
🥳 Create your first app
Create a project, add Reflex, and start the development server with uv:
mkdir my_app_name
cd my_app_name
uv init
uv add reflex
uv run reflex init
uv run reflex run
You should see your app running at http://localhost:3000.
Now you can modify the source code in my_app_name/my_app_name.py. Reflex has fast refreshes so you can see your changes instantly when you save your code.
🫧 Example App
Build an image generation app in Python with Reflex: define the UI, manage state in a class, and call an image model from an event handler.
import reflex as rx
import openai
client = openai.AsyncOpenAI()
class State(rx.State):
prompt: str = ""
image_url: str = ""
processing: bool = False
@rx.event
def set_prompt(self, value: str):
self.prompt = value
@rx.event
async def generate(self):
self.processing = True
yield
response = await client.images.generate(
model="gpt-image-1.5",
prompt=self.prompt,
)
self.image_url = f"data:image/png;base64,{response.data[0].b64_json}"
self.processing = False
def index():
return rx.vstack(
rx.heading("Image Generator"),
rx.input(placeholder="Enter a prompt...", on_change=State.set_prompt),
rx.button("Generate", on_click=State.generate, loading=State.processing),
rx.image(src=State.image_url),
)
app = rx.App()
app.add_page(index, title="Reflex:Image Generation")
All Thanks To Our Contributors:
Metadata
Release files for reflex 0.10.1
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| File | Size | Uploaded | Provenance | Actions |
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| reflex-0.10.1.tar.gz | 274.8 kB | Without provenance | Details for reflex-0.10.1.tar.gz |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Actions Reset |
|---|---|---|---|---|
| reflex-0.10.1-py3-none-any.whl | Python 3 | none | any | Details for reflex-0.10.1-py3-none-any.whl |
Total release size: 592.0 kB
Release files / reflex-0.10.1.tar.gz
| Download URL | reflex-0.10.1.tar.gz |
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SHA-256 checksum How to use checksums |
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uv/0.12.5 {"installer":{"name":"uv","version":"0.12.5","subcommand":["publish"]},"python":null,"implementation":{"name":null,"version":null},"distro":{"name":"Ubuntu","version":"24.04","id":"noble","libc":null},"system":{"name":null,"release":null},"cpu":null,"openssl_version":null,"setuptools_version":null,"rustc_version":null,"ci":true}
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| Tags | Python 3 |
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