Author mark.dickinson
Recipients Arfrever, barry, eli.bendersky, eric.araujo, eric.smith, ethan.furman, georg.brandl, jaraco, mark.dickinson, mrabarnett, pitrou, r.david.murray, rhettinger, sbt, serhiy.storchaka, theller, tim.peters, vstinner
Date 2013-12-12.20:34:01
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+1 for this (for Python 3.5, now, I guess). I've just found another place where I'd use it.

Looking at the implementation, one thing surprises me a bit:  I'd expect the KeyError from a 'del' or 'pop' operation to have the untransformed key rather than the transformed key in its .args.

How about '_keys' and '_values' for the slot names, in place of '_original' and '_data'?
Date User Action Args
2013-12-12 20:34:01mark.dickinsonsetrecipients: + mark.dickinson, tim.peters, barry, theller, georg.brandl, rhettinger, jaraco, pitrou, vstinner, eric.smith, eric.araujo, mrabarnett, Arfrever, r.david.murray, eli.bendersky, ethan.furman, sbt, serhiy.storchaka
2013-12-12 20:34:01mark.dickinsonsetmessageid: <>
2013-12-12 20:34:01mark.dickinsonlinkissue18986 messages
2013-12-12 20:34:01mark.dickinsoncreate