Method __init__

core/src/stdlib/pyscript/websocket.py:178–222

Create a new WebSocket connection from the given `url` (`ws://` or `wss://`). Optionally specify `protocols` (a string or a list of protocol strings) and event handlers (`onopen`, `onmessage`, etc.) as keyword arguments. These arguments and naming convention

(self, url, protocols=None, **handlers)

    CLOSED = 3

    def __init__(self, url, protocols=None, **handlers):
        """
        Create a new WebSocket connection from the given `url` (`ws://` or
        `wss://`). Optionally specify `protocols` (a string or a list of
        protocol strings) and event handlers (`onopen`, `onmessage`, etc.) as
        keyword arguments.

        These arguments and naming conventions mirror those of the
        [underlying JavaScript WebSocket API](https://developer.mozilla.org/en-US/docs/Web/API/WebSocket)
        for familiarity.

        If you need access to the underlying JavaScript WebSocket instance,
        you can get it via the `_js_websocket` attribute.

        ```python
        # Basic connection.
        ws = WebSocket(url="ws://localhost:8080/")

        # With protocol.
        ws = WebSocket(
            url="wss://example.com/socket",
            protocols="chat"
        )

        # With handlers.
        ws = WebSocket(
            url="ws://localhost:8080/",
            onopen=lambda e: print("Connected"),
            onmessage=lambda e: print(e.data)
        )
        ```
        """
        # Create underlying JavaScript WebSocket.
        if protocols:
            js_websocket = js.WebSocket.new(url, protocols)
        else:
            js_websocket = js.WebSocket.new(url)
        # Set binary type to arraybuffer for easier Python handling.
        js_websocket.binaryType = "arraybuffer"
        # Store the underlying WebSocket.
        # Use object.__setattr__ to bypass our custom __setattr__.
        object.__setattr__(self, "_js_websocket", js_websocket)
        # Attach any event handlers passed as keyword arguments.
        for handler_name, handler in handlers.items():
            setattr(self, handler_name, handler)

    def __getattr__(self, attr):
        """