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[Python-ideas] Preserving **kwargs order

MRAB python at mrabarnett.plus.com
Thu Mar 20 03:42:54 CET 2014 
On 2014-03-20 01:58, Andrew Barnert wrote:> On Mar 19, 2014, at 16:32, 
Eric Snow <ericsnowcurrently at gmail.com> wrote:
 >
 >> Hopefully I'll have time to write a proto-PEP on this in the next
 >> couple weeks, but the gist is that I see 2 options:
 >
 > Last time around, someone suggested that ***kwargs could get you the
 > args as a list of pairs, or maybe an OrderedDict. While that would
 > require a bit of complexity in the CALL_FUNCTION code, it seems like
 > it would be simpler than your option 2.
 >
 > But it doesn't solve the main problem. Right now, you can forward
 > any arguments perfectly by doing this:
 >
 >      def wrapper(*args, **kwargs):
 >          return wrappee(*args, **kwargs)
 >
 > Your option 2 would require much more verbose code to forward
 > perfectly. The triple-star idea makes it a lot nicer (assuming that
 > ** passing respects the order, or a new *** is added there as well),
 > but it would still break the thousands of wrapper functions out
 > there written with **kwargs.
 >

Wouldn't it be a problem only if the dict were unpacked and then
repacked? In the code above, it's merely passing the input kwargs on to
'wrappee'.
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