{"library":"python-socketio","code":"import socketio\nimport eventlet\n\nsio = socketio.Server(cors_allowed_origins=\"*\")\napp = socketio.WSGIApp(sio, static_files={\n '/': {'content_type': 'text/html', 'filename': 'index.html'}\n})\n\n@sio.event\ndef connect(sid, environ):\n print('connect ', sid)\n\n@sio.event\ndef my_message(sid, data):\n print('message ', data)\n sio.emit('my response', {'data': data}, room=sid)\n\n@sio.event\ndef disconnect(sid):\n print('disconnect ', sid)\n\nif __name__ == '__main__':\n # index.html for testing\n with open('index.html', 'w') as f:\n f.write('''\n \n \n \n Socket.IO Test\n \n \n \n Socket.IO Test
\n \n \n \n ''')\n print(\"Starting server on http://localhost:5000\")\n eventlet.wsgi.server(eventlet.listen(('', 5000)), app)\n","lang":"python","description":"This quickstart demonstrates a basic Socket.IO server using `eventlet` and a simple HTML client. The server defines handlers for `connect`, `my_message`, and `disconnect` events. The client connects, sends a message, and receives a response. An `index.html` file is created on the fly for easy testing. Remember to `pip install eventlet` for this example to run.","tag":null,"tag_description":null,"last_tested":"2026-04-24","results":[{"runtime":"python:3.10-alpine","exit_code":1},{"runtime":"python:3.10-slim","exit_code":1},{"runtime":"python:3.11-alpine","exit_code":1},{"runtime":"python:3.11-slim","exit_code":1},{"runtime":"python:3.12-alpine","exit_code":1},{"runtime":"python:3.12-slim","exit_code":1},{"runtime":"python:3.13-alpine","exit_code":1},{"runtime":"python:3.13-slim","exit_code":1},{"runtime":"python:3.9-alpine","exit_code":1},{"runtime":"python:3.9-slim","exit_code":1}]}