Fix DatagramRequestHandler.packet type hint.

[kmvanbrunt]

Fixed DatagramRequestHandler.packet type hint to be bytes. typeshed is currently typing it as a socket.

In Python's stdlib, packet is set in the following code located in socketserver.py.

class DatagramRequestHandler(BaseRequestHandler):

    """Define self.rfile and self.wfile for datagram sockets."""

    def setup(self):
        from io import BytesIO
        self.packet, self.socket = self.request
        self.rfile = BytesIO(self.packet)
        self.wfile = BytesIO()

self.packet is the first element in the self.request tuple which is a typedshed._RequestType.

_RequestType: TypeAlias = _socket | tuple[bytes, _socket]

Additionally, in the setup() method shown above self.packet is being passed to BytesIO(), so it is definitely a bytes object.

[github-actions]

According to mypy_primer, this change has no effect on the checked open source code. 🤖🎉

[srittau]

Thanks!