On Tue, Dec 29, 2020 at 8:11 AM Steven D'Aprano <st...@pearwood.info> wrote:
> On Mon, Dec 28, 2020 at 11:36:55PM -0800, Christopher Barker wrote: > > > Side Question: when should one use __dict__ vs vars() vs getattr() ??? > all > > three work in this case, but I'm never quite sure which is prefered, and > > why. > > `vars(obj)` is defined as returning `obj.__dict__` so technically it > probably doesn't matter, but I feel that as a matter of aesthetics and > future-proofing, we should avoid direct use of dunders whenever > practical. > To the contrary, vars() is something I added to the language for the benefit of REPL users (like dir()), and other usages look suspect to me. I find that using `__dict__` is more direct about the purpose, and also it is the prevailing style. > Do you prefer to write `mylist.__len__()` over `len(mylist)`? Then you > will probably prefer `obj.__dict__` over `vars(obj)` too :-) > Not a valid analogy. -- --Guido van Rossum (python.org/~guido) *Pronouns: he/him **(why is my pronoun here?)* <http://feministing.com/2015/02/03/how-using-they-as-a-singular-pronoun-can-change-the-world/>
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