2013年9月12日 Ethan Furman <[email protected]>: > On 09/11/2013 02:39 PM, Tim Delaney wrote: >> >> >> I would think that retrieving the keys from the dict would return the >> transformed keys (I'd >> call them canonical keys). > > > The more I think about this the more I agree. A canonicaldict with a key > function that simply stored the transformed key and it's value would seem to > be a lot simpler: > > - no need to store a separate "presentation" key > - no confusion about which of the first key/last key seen is stored > - no mistakes with the "first" key not being added before real data > and getting the presentation key wrong
If original keys aren't stored then d = TransformDict(transfunc, ...) for k in d: dosomething(k, d[k]) will break if transfunc(transfunc(x)) != transfunc(x) -- 闇に隠れた黒い力 弱い心を操る _______________________________________________ Python-Dev mailing list [email protected] https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com