Hi,

I’ve asked this one already at the Twisted dinner (thanks again for it, it was 
probably my PyCon highlight) and got various answers from people sitting around 
me. I’m still indecisive so I’d like to gather even more opinions[1]. I already 
tried to ask on IRC but my time zone is just not very #twisted friendly so I 
got zero replies.

My question can be simplified to: Closures yes or no?

They seem *really* handy since they allow to have some data present without 
handing it through all the time. Eg in my cred checker, I can refer to the user 
name from the closure instead of passing it around all the time – making the 
code much cleaner. Also most current examples and 
callbacks-are-hard-FUD-rebuttals seem to use them.

OTOH, private methods like `_cbPrintResult` are nicer to test individually.

If “yes, closures”: Still using cb/eb prefixes? I don’t see them very often in 
recent examples. What about addBoth handlers?

Bonus points for the preferred style for the Twisted code base.

Thanks in advance & thank you for your time,
Hynek

[1]: I’d be glad if people from the dinner replied again too so I/we have it in 
written form, my memory tends to be rather sloppy.
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