'NpipeSocket' object has no attribute '_sock'

Hi!

I'm trying to send commands to the stdin of a container. On Linux, I can do this sending to the _sock like this.

container = self._docker_client.containers.get(test)

s = container.attach_socket(params={"stdin": 1, "stream": 1})
s._sock.send(f"{command}\n".encode("utf-8"))
s.close()

But, when I try to do this on Windows I get the following exception.

AttributeError: 'NpipeSocket' object has no attribute '_sock'

Is there any equivalent way of getting _sock on the Windows socket?

If you want some context, this is where I'd like to use it: https://github.com/wilfred-dev/wilfred/blob/22c38862f162cb5c586df4f3de8d447cdddcf24a/wilfred/servers.py#L286

Start by tracing the attach_socket API and the NpipeSocket object mentioned in the report, then compare their Windows and Linux behavior. Check whether the project has tests covering socket attachment on Windows. Done means establishing and documenting a supported way to send stdin commands on Windows, or clearly documenting the limitation if none exists.