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[](https://websocket-client.readthedocs.io/)
[](https://github.com/websocket-client/websocket-client/actions/workflows/build.yml)
[](https://codecov.io/gh/websocket-client/websocket-client)
[](https://pepy.tech/project/websocket-client)
[](https://pypi.org/project/websocket_client/)
# websocket-client
websocket-client is a WebSocket client for Python. It provides access
to low level APIs for WebSockets. websocket-client implements version
[hybi-13](https://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-13)
of the WebSocket procotol. This client does not currently support the
permessage-deflate extension from
[RFC 7692](https://tools.ietf.org/html/rfc7692).
## Documentation
This project's documentation can be found at
[https://websocket-client.readthedocs.io/](https://websocket-client.readthedocs.io/)
## Contributing
Please see the [contribution guidelines](https://github.com/websocket-client/websocket-client/blob/master/CONTRIBUTING.md)
## Installation
First, install the following dependencies:
- six
- backports.ssl\_match\_hostname for Python 2.x
You can install the dependencies with the command `pip install six` and
`pip install backports.ssl_match_hostname`
You can use either `python setup.py install` or `pip install websocket-client`
to install. This module is tested on Python 2.7 and Python 3.4+. Python 3
support was first introduced in version 0.14.0, but is a work in progress.
## Usage Tips
Check out the documentation's FAQ for additional guidelines:
[https://websocket-client.readthedocs.io/en/latest/faq.html](https://websocket-client.readthedocs.io/en/latest/faq.html)
Known issues with this library include lack of WebSocket Compression
support (RFC 7692) and [minimal threading documentation/support](https://websocket-client.readthedocs.io/en/latest/threading.html).
## License
- LGPL version 2.1
### Performance
The `send` and `validate_utf8` methods are very slow in pure Python. You can
disable UTF8 validation in this library (and receive a performance enhancement)
with the `skip_utf8_validation` parameter. If you want to get better
performance, please install both numpy and wsaccel, and import them into your
project files - these other libraries will automatically be used when available.
Note that wsaccel can sometimes cause other issues.
### Long-lived Connection
Most real-world WebSockets situations involve longer-lived connections.
The WebSocketApp `run_forever` loop automatically tries to reconnect when a
connection is lost, and provides a variety of event-based connection controls.
The project documentation has
[additional examples](https://websocket-client.readthedocs.io/en/latest/examples.html)
```python
import websocket
try:
import thread
except ImportError:
import _thread as thread
import time
def on_message(ws, message):
print(message)
def on_error(ws, error):
print(error)
def on_close(ws):
print("### closed ###")
def on_open(ws):
def run(*args):
for i in range(3):
time.sleep(1)
ws.send("Hello %d" % i)
time.sleep(1)
ws.close()
print("thread terminating...")
thread.start_new_thread(run, ())
if __name__ == "__main__":
websocket.enableTrace(True)
ws = websocket.WebSocketApp("ws://echo.websocket.org/",
on_open = on_open,
on_message = on_message,
on_error = on_error,
on_close = on_close)
ws.run_forever()
```
### Short-lived Connection
This is if you want to communicate a short message and disconnect
immediately when done. For example, if you want to confirm that a WebSocket
server is running and responds properly to a specific request.
The project documentation has
[additional examples](https://websocket-client.readthedocs.io/en/latest/examples.html)
```python
from websocket import create_connection
ws = create_connection("ws://echo.websocket.org/")
print("Sending 'Hello, World'...")
ws.send("Hello, World")
print("Sent")
print("Receiving...")
result = ws.recv()
print("Received '%s'" % result)
ws.close()
```
If you want to customize socket options, set sockopt, as seen below:
```python
from websocket import create_connection
ws = create_connection("ws://echo.websocket.org/",
sockopt=((socket.IPPROTO_TCP, socket.TCP_NODELAY),))
```
### Acknowledgements
Thanks to @battlemidget and @ralphbean for helping migrate this project to
Python 3.
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