On 12 September 2013 02:03, Ethan Furman
On 09/11/2013 08:49 AM, Victor Stinner wrote:
2013/9/11 Ethan Furman
: 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