Sublime Text hotkey that triggers only when in a certain syntax #sublimetext

selector-based-hotkey.json

[
    {
        "keys": ["f8"],
        "command": "repl_open",
        "args": {
            "cmd": ["python", "-u", "$file_basename"],
            "cwd": "$file_path",
            "encoding": "utf8",
            "extend_env": {"PYTHONIOENCODING": "utf-8"},
            "external_id": "python",
            "type": "subprocess",
        },
        "context": [
            {
                "key": "selector",
                "operator": "equal",
                "operand": "source.python",
            }
        ],
    },
]