Add support for asyncio

[abalkin]

It should be possible to implement an asyncio event loop based on kdb+ sd1/sd0. Once such an event loop is available, it should be straightforward to implement asynchronous calls from q to Python.

[jfakx]

so if a message came in on .z.ps, how might code look from handling that message to returning a response - using asyncio?

[abalkin]

You can see some simple examples in the Python Manual. Ideally something like

p)async def hello_world(x):'
    await asyncio.sleep(10)
    print("Hello World!")
.z.ps:.p.callable .p.pyeval"hello_world"

would result in "Hello World!" printed on the server console 10 seconds after each client message, but will not block the client.

[mittonsimon]

@jhanna-kx @jfakx - Is there any way to expose the sd1/sd0 handlers like in C so that python can run threaded work and push results back into the Q session?