install
python -m venv ws_env
source ws_env/bin/activate # source ws_env/Scripts/activate
pip install --upgrade pip # python.exe -m pip install --upgrade pip
pip install websockets pytz
run server and client
source ws_env/bin/activate
# windows git bash
source ws_env/Scripts/activate
python hello_server.py
source ws_env/bin/activate
# windows git bash
source ws_env/Scripts/activate
python hello_client.py
format code
source ws_env/bin/activate
# windows git bash
source ws_env/Scripts/activate
pip install black
black .
websockets doc: https://websockets.readthedocs.io/en/stable/index.html