#twisted

!HALP I am getting an import error "ImportError: cannot import name ClientService"

SKYWARN: can you provide any additional information?

https://paste.pound-python.org/show/dWTTLRZjReG... (repasted for SKYWARN)

SKYWARN: what version of twisted?

Twisted-13.1.0-py2.7-linux-x86_64.egg

SKYWARN: that's a very old version of twisted that was released before ClientService existed: https://twistedmatrix.com/documents/13.1.0/api/...

SKYWARN: ClientService was introduced in 16.1.0: https://github.com/twisted/twisted/blob/trunk/N...

oh ok

i needed to upgrade pip then

Tickets pending review: https://tm.tl/#761, #8966 (the0id), #9100, #9101, #9118 (the0id), #4964 (jameshilliard), #9131, #9138, #9143, #7530, #7945, #9240, #9243

So, I'm following the fingerd tutorial on the twisted docs, but I bumped into a weird thing

In this code: https://bpaste.net/show/376e161b9628, the commented method works properly when I test it with telnet, but the non-commented one doesn't. The connection gets dropped, but I don't receive the value that is written in the transport

What am I missing in the method using @inlineCallbacks?

Ok, so, apparently, if I don't wrap lineReceived in inlineCallbacks, but put code in another method and call it from there, wrap this method with inlineCallbacks, and call it from lineReceived, it works.

Still don't know why, though =(

adourado: a callable decorated with @inlineCallbacks returns a Deferred when called

adourado: if lineReceived returns something truthy, it will disconnect the protocol, for historical reasons

this is deprecated behavior

adourado: Deferreds are truthy

(the actual deprecated behavior is a protocol disconnects if dataReceived returns a truthy value, but this carries through to lineReceived because LineReceiver.dataReceived returns whatever lineReceived returns, if it returns a truthy value)