On Thu, Jun 25, 2020 at 7:55 PM Christopher Barker <python...@gmail.com>
wrote:
> On Thu, Jun 25, 2020 at 9:02 AM Steele Farnsworth <swfarnswo...@gmail.com>
> wrote:
> indeed -- and that is pretty darn baked in to Python, so I don't think
> it's going to change.
>
>
Except this convention doesn't hold for dict.setvalue (which I did
misspell, sorry), or for dict.pop. Both these methods fundamentally mutate
the collection, but they also return a value (which could be retrieved by a
non-mutating method), that somewhat pertains to the operation performed.
> Note: I"n not sure your example with setdefault is correct:
>
Fair enough, I misspelled setdefault and messed up the example, what I
meant was:
seen = {}
for k, v in iterable_of_tuples:
if seen.setdefault(k,v) is not v:
... # duplicate key
else:
... # new key
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