[Python-Dev] setdefault's second argument
raymond.hettinger at verizon.net
Tue Aug 30 18:35:05 CEST 2005
> Anyone remember why setdefault's second argument is optional?
IIRC, this is a vestige from its ancestor. The proposal for
setdefault() described it as behaving like dict.get() but inserting the
key if not found.
> Haven't found
> any 1-arg uses of setdefault() either, except for test code verifying
> that you _can_ omit the second arg.
Likewise, I found zero occurrences in the library, in my cumulative code
base, and in the third-party packages on my system.
> If there isn't a sane use case for leaving the second argument out,
> I'd like to drop the possibility in P3K (assuming setdefault()
Give a lack of legitimate use cases, do we have to wait to Py3.0? It
could likely be fixed directly and not impact any code that people care
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