> wfdc (should we call you something which is not a random-looking string of > consonants?)
wfdc is fine. > it might help if you could give examples of this functionality from other > languages or classes. What do they call the method? https://clojuredocs.org/clojure.core/assoc https://immutable-js.com/docs/v4.0.0/set()/ http://swannodette.github.io/mori/#assoc https://hackage.haskell.org/package/lens-5.1/docs/Control-Lens-Operators.html#v:.-126- https://hackage.haskell.org/package/containers-0.6.5.1/docs/Data-Sequence.html#update What about 'update' or 'set'? > what if index assignment was an expression? [...] Now that I have seen this > syntax, I want it!!! Interesting idea. Perhaps we can discuss it further. ------- Original Message ------- On Monday, March 14th, 2022 at 8:38 AM, Steven D'Aprano <st...@pearwood.info> wrote: > On Fri, Mar 11, 2022 at 01:38:57AM +0000, Rob Cliffe via Python-ideas wrote: > > > This could cause confusion because str.replace() has a completely > > > > different API. > > The old "painter.draw()" versus "gun_slinger.draw()" problem. > > It does exist, but it's not generally a major problem. > > > And indeed if a replace method were added to tuples, a fair case could > > > > be made for it having the same API, viz. > > > > replace(old, new, count=-1) > > A reasonable suggestion. Does replace change items according to their > > position, or their value? > > Perhaps a better name would help. > > wfdc (should we call you something which is not a random-looking string > > of consonants?) it might help if you could give examples of this > > functionality from other languages or classes. What do they call the > > method? > > It would be nice to have a better API for this function. I have used it > > many times, for strings, lists and tuples, it is really a generate > > sequence operation: > > * make a copy of the sequence, replacing the item at position p with a > > new value; > > We can do it with type-specific expressions: > > seq[:p] + [value] + seq[p+1:] > > seq[:p] + (value,) + seq[p+1:] > > string[:p] + "c" + string[p+1:] > > but there is no good, type-agnostic way to easily do it. > > Wacky thought: what if index assignment was an expression? > > function(arg, seq[p]=value, another_arg) > > would pass a copy of seq with the item at p replaced by value. That > > would work with slices as well: > > seq[a:b] = values > > Now that I have seen this syntax, I want it!!! > > (It is not clear to me if this would be compatible to the existing > > `setitem API.) > > > Whereas your suggestion can be written as a simple 1-liner, as you > > > > demonstrate. So there is no strong need for a new method for it. > > Sure, not all one-liners need to be built-in. But some do. > > -- > > Steve > > _______________________________________________ > > Python-ideas mailing list -- python-ideas@python.org > > To unsubscribe send an email to python-ideas-le...@python.org > > https://mail.python.org/mailman3/lists/python-ideas.python.org/ > > Message archived at > https://mail.python.org/archives/list/python-ideas@python.org/message/HKYHO35W5M3LKUGUZ6MRYVVEIKUQ5XHC/ > > Code of Conduct: http://python.org/psf/codeofconduct/ _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-le...@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/R3GVWUZFQEMDY45FDKL536IXI7WX4A34/ Code of Conduct: http://python.org/psf/codeofconduct/
