So it actually sounds like having a dict method for performing write operations with a factory function would be a semantic improvement.
On Thu, Nov 1, 2018 at 8:50 PM Guido van Rossum <gu...@python.org> wrote: > On Thu, Nov 1, 2018 at 7:23 PM Robert Vanden Eynde <robertv...@gmail.com> > wrote: > >> The two are less connected than you seem to think. >>> >> >> Really ? What's the use mainstream use cases for setdefault ? >> I was often in the case of Alex. >> > > Well, defaultdict configures a default when an instance is created, while > setdefault() is used when inserting a value. > > A major issue IMO with defaultdict is that if you try to *read* a > non-existing key it will be inserted. > > -- > --Guido van Rossum (python.org/~guido) >
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