On 12 September 2013 02:03, Ethan Furman <et...@stoneleaf.us> wrote: > On 09/11/2013 08:49 AM, Victor Stinner wrote: > >> 2013/9/11 Ethan Furman <et...@stoneleaf.us>: >> >>> He isn't keeping the key unchanged (notice no white space in MAPPING), >>> he's >>> merely providing a function that will automatically strip the whitespace >>> from key lookups. >>> >> >> transformdict keeps the key unchanged, see the first message: >> >> >>> d = transformdict(str.lower) >> >>> d['Foo'] = 5 >> >>> d['foo'] >> 5 >> >>> d['FOO'] >> 5 >> >>> list(d) >> ['Foo'] >> > That seems backwards to me. I would think that retrieving the keys from the dict would return the transformed keys (I'd call them canonical keys). That way there's no question about which key is stored - it's *always* the transformed key.
In fact, I think this might get more traction if it were referred to as a canonicalising dictionary (bikeshedding, I know). Tim Delaney
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