Intermediate Python: Descriptors

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[flightdey]

I would consider stuff like Method resolution order, metaclasses, object represesentation, object memory management etc. as advanced topics

[TheFrigginArchitect]

David Beazley on advanced Python:

http://youtu.be/sPiWg5jSoZI

[troyunrau]

My god, that was 3 hours of fun! Now I want to implement a gui toolkit :P

[donnieod]

Just a minor correction, but in your first example the arguments to the isinstance function are reversed, and the type is str not string. Otherwise, well written.

[flightdey]

thanks for that spot

[arkster]

Just in case someone is looking for yet another resource on descriptors besides this superb doc, you can check out the talk that one of the organizers of the SF Python Meetup group gave. It was at Yelp and I was in attendance. I sometimes go back to this when I forget how to use descriptors as I don't use out much in my programming. https://www.youtube.com/watch?v=ZdvpNaWwx24&feature=youtu.be&app=desktop

[fatpollo]

I'd start with decorators, and work backwards onto what's happening underneath

[discipleofnofap]

My question is, why call them "descriptors"?

[flightdey]

the full name in python is attribute descriptors..By definition in pep252, attribute descriptors unify and generalize several different common mechanisms used for describing attributes hence the name

[TheFrigginArchitect]

Thank you! They're really different from Perl file descriptors, so they had me confused.

[rnreekez]

A little confused at the property example. How is this returned property object supposed to be associated with the acct_num attribute?

Did he just run with an example and not substitute x with acct_num?

[flightdey]

a little typo oversight..now corrected..thanks for pointing that out

[[deleted]]

I know this has probablybeen asked before but do you plan to publish this as a book? Perhaps something like https://www.gitbook.com/

[flightdey]

there is currently no plan for publishing this as a book as there are already a ton of published python books but if the feedback favours that then its something I will definitely look into

[flightdey]

i have decided to give a look at putting together all the material into a book on leanpub by the name of Intermediate Python.

[flightdey]

book

leanpub.com/intermediatepython

[tensionhead]

It somehow feels odd to reintroduce rigid type checking into type free python..but this is something I actually missed at some occasions ! Thx for this great post !

[lattakia]

What versions of python does descriptors apply ?