#twisted

if success is False, then value will be a failure

runciter: ooooh.

that makes far more sense than how i had understood the docs for DeferredList

lovely

thanks!

cdunklau: :)

Good evening #twisted

Have anyone seen AMQ protocol implementation of version 1 ?

runciter, asdf: so here's what I've come up with. look reasonable? https://bpaste.net/show/0d212fe22e8a

with pretty colors: https://bpaste.net/show/91716a9607d9

cdunklau: looks pretty good to me!

cdunklau: i wouldn't use inline callbacks for this

runciter: why not?

but that's a matter of style

cdunklau: harder to step through :)

runciter: step through how? reading, or when it blows up :)

cdunklau: *if* it blows up ;)

but yep

fair enough

i've gone overboard with inlineCallbacks on this project

like, 50% of my functions if not more use it

it's super useful!

again, it's a matter of style

there can be some weirdness with inline callbacks, too

but we can just hand wave that away!

so DeferredList won't errback if i don't give it a keyword arg, right?

cdunklau: ??

cdunklau: by default the deferred returned by a DeferredList won't fire until all the callbacks in the list have fired

gotta run!

okay, so i have a DeferredList and i want to get the results and failures from each... but how do i stop the deferreds from thinking the errors are unhandled?

i can't use consumeErrors=True because that gets rid of the failures

ohhh if i add errbacks to the deferreds in the list that handle them, the deferred list still detects the failure

but only if i add the errbacks _after_ giving the list to DeferredList

i guess i'd add an errback to every individual deferred rather than going and looking at the accumulated results

if that works

asdf: yeah that's it. but you have to add it after handing it to the DeferredList, because the call/errbacks DeferredList adds to them just record which was called and pass the input through

asdf: so it becomes this https://bpaste.net/show/98f869f3cc29

uh that's odd

asdf: what's odd?

that you'd get 'unhandled error' messages

why? DeferredList's errback returns the failure

asdf: https://bpaste.net/show/4063fd571639

foo2.py doesn't add the `lambda err: None` callback. the failed Deferred stays in the "errored" state, so when it gets collected, __del__ dumps that error

or... you know, however twisted does that

ah it's t.i.defer.DebugInfo that does that

yes, i meant adding the errback before putting everything in DList

asdf: aha. well, if i do that, the DeferredList will tell me everything succeeded

yes

oh, you dont want that

asdf: right. the use case here is: after all the operations have completed (either succeeded or failed), i want to report a summary of the number of successes, number of failures, and the hosts for those that failed

Tickets pending review: https://tm.tl/#8659, #7879, #8809, #8880, #8900, #8912, #8566 (hawkowl), #8959, #8950, #8957

I've got a script which contains a bug in twisted, how can I import the twisted git repo quicky into my python process so I can run it over and over?

reactormonk, clone the repo and `$ pip install -e directory/` it

then the code from the directory will be used so you can make changes to it etc

or is that not what you meant

asdf, I installed the dependencies via pacman, and `PYTHONPATH=src python /tmp/test.py` works

right

usually you'll want to use virtualenv+pip instead of your distro package manager, because some other programs that you install might require twisted (same for other libraries)

so virtualenv allows you to have a separate install of whatever version you need

and well distro repositories tend to have old versions of stuff

More the other way, arch ships python 3.5, and twisted wants python 3.4 ^^

how do I tell listenUDP I want an ipv6 socket?

i think just need to provide a udp host

err `.listenUDP(1234, Proto(), interface='::1')` should do that i think?

asdf, the default is to have the all ipv4 address, what's the ipv6 equivalent?

just setting the interface to '::'

similarly setting the interface to '0.0.0.0' would be all ipv4

but its all ipv4 by default anyway, but not all ipv6 by default

(i think..)

Yeah.

Hm. Where's the Resolver constructor?

ah, __init__