[Python-ideas] Tulip / PEP 3156 (original) (raw)

[Python-ideas] Tulip / PEP 3156 - subprocess events

Greg Ewing greg.ewing at canterbury.ac.nz
Sat Jan 19 00:59:38 CET 2013

Guido van Rossum wrote:

Well, except that you can't just pass CallbackProtocol where a protocol factory is required by the PEP -- you'll have to pass a lambda or partial function without arguments that calls CallbackProtocol with some arguments taken from elsewhere.

Something smells wrong to me about APIs that require protocol factories. I don't see what advantage there is in writing

create_connection(HTTPProtocol, "some.where.net", 80)

as opposed to just writing something like

HTTPProtocol(TCPTransport("some.where.net", 80))

You're going to have to use the latter style anyway to set up anything other than the very simplist configurations, e.g. your earlier 4-layer protocol stack example.

So create_connection() can't be anything more than a convenience function, and unless I'm missing something, it hardly seems to add enough convenience to be worth the bother.

-- Greg

More information about the Python-ideas mailing list