Panther

A Fast & Friendly Web Framework for Building Async APIs with Python 3.10+

🐾 Why Choose Panther?

Panther is designed to be fast, simple, and powerful. Here's what makes it special:

One of the fastest Python frameworks available (Benchmark)
File-based database (PantherDB) - No external database setup required
Document-oriented ODM - Supports MongoDB & PantherDB with familiar syntax
API caching system - In-memory and Redis support
OpenAPI - Auto-generated API documentation with multiple UI options
WebSocket support - Real-time communication out of the box
Authentication & Permissions - Built-in security features
Background tasks - Handle long-running operations
Middleware & Throttling - Extensible and configurable

Quick Start

Installation

pip install panther

Create a main.py file with one of the examples below.

Your First API

Here's a simple REST API endpoint that returns a "Hello World" message:

from datetime import datetime, timedelta
from panther import status, Panther
from panther.app import GenericAPI
from panther.openapi.urls import url_routing as openapi_url_routing
from panther.response import Response

class HelloAPI(GenericAPI):
    # Cache responses for 10 seconds
    cache = timedelta(seconds=10)
    
    def get(self):
        current_time = datetime.now().isoformat()
        return Response(
            data={'message': f'Hello from Panther! 🐾 | {current_time}'},
            status_code=status.HTTP_200_OK
        )

# URL routing configuration
url_routing = {
    '/': HelloAPI,
    'docs/': openapi_url_routing,  # Auto-generated API docs
}

# Create your Panther app
app = Panther(__name__, configs=__name__, urls=url_routing)

WebSocket Echo Server

Here's a simple WebSocket echo server that sends back any message it receives:

from panther import Panther
from panther.app import GenericAPI
from panther.response import HTMLResponse
from panther.websocket import GenericWebsocket

class EchoWebsocket(GenericWebsocket):
    async def connect(self, **kwargs):
        await self.accept()
        await self.send("Connected to Panther WebSocket!")
    
    async def receive(self, data: str | bytes):
        # Echo back the received message
        await self.send(f"Echo: {data}")

class WebSocketPage(GenericAPI):
    def get(self):
        template = """
        <h2>🐾 Panther WebSocket Echo Server</h2>
        <input id="msg"><button onclick="s.send(msg.value)">Send</button>
        <ul id="log"></ul>
        <script>
            const s = new WebSocket('ws://127.0.0.1:8000/ws');
            s.onmessage = e => log.innerHTML += `<li><- ${msg.value}</li><li>-> ${e.data}</li>`;
        </script>
        """
        return HTMLResponse(template)

url_routing = {
    '': WebSocketPage,
    'ws': EchoWebsocket,
}
app = Panther(__name__, configs=__name__, urls=url_routing)

Run Your Application

Start the development server
```
$ panther run main:app
```
Test your application
- For the API example: Visit http://127.0.0.1:8000/ to see the "Hello World" response
- For the WebSocket example: Visit http://127.0.0.1:8000/ and send a message.

For LLMs and Coding Agents

Start with:

These files are kept focused on current Panther APIs and copyable examples.

🙏 Acknowledgments

Supported by

⭐️ If you find Panther useful, please give it a star!

Release files for panther 5.5.0

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for panther 5.5.0
File	Size	Uploaded
panther-5.5.0.tar.gz	143.1 kB	Jul 21, 2026	Details

Built distribution (wheel)

Table of built distributions (wheels) for panther 5.5.0
File	Interpreter	ABI	Platform	Reset
panther-5.5.0-py3-none-any.whl 113.1 kB Jul 21, 2026	Python 3	none	any	Details

Total release size: 256.2 kB

Release files / panther-5.5.0.tar.gz

Download URL	panther-5.5.0.tar.gz
Size	143.1 kB
Tags	Source
SHA-256 checksum How to use checksums	`8acc885807128258d0282fad9b9e0098e578198c122f63810af5840d9f554e6f`
BLAKE2b-256 checksum How to use checksums	`1d5f7956e36af0b074eaa7709df6913946be6004bff707c43b4787ffe6dfe5b3`
Upload date	Jul 21, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/6.1.0 CPython/3.13.14`

Release files / panther-5.5.0-py3-none-any.whl

Download URL	panther-5.5.0-py3-none-any.whl
Size	113.1 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`e4821ce63d001c03f59d8f2c7e5cb3a09d33929510f24ecaa7a8db366ba3d8ad`
BLAKE2b-256 checksum How to use checksums	`02d351976ad97ca5fdd94b858fb064c8fb094a68367fdcdae2dabfef84a123fa`
Upload date	Jul 21, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/6.1.0 CPython/3.13.14`