[Python-Dev] repeated keyword arguments

Scott Dial scott+python-dev at scottdial.com
Sat Jun 28 04:11:03 CEST 2008

Steven D'Aprano wrote:
> It would be nice to be able to do this:
> defaults = dict(a=5, b=7)
> f(**defaults, a=8)  # override the value of a in defaults

I can't help but think that would be difficult coding convention to use. 
However, I'm considerably less bothered by:

def f_with_defaults(**kw):
     defaults = dict(a=5, b=7)
     return f(**defaults)

The only way f(**defaults, a=8) would be useful is if it happens a lot, 
and in that case, it's just as good of a candidate for being made into a 
function itself. I see this pattern all the time, and given that 
"f_with_defaults" probably has some semantic meaning, it probably would 
be nice to give it it's own name ("g").

Just my 2 cents.

Scott Dial
scott at scottdial.com
scodial at cs.indiana.edu

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