(objects as) mutable dictionary keys
steve at holdenweb.com
Fri Jan 14 17:22:20 EST 2005
Antoon Pardon wrote:
> Op 2005-01-14, Peter Maas schreef <peter at somewhere.com>:
>>I have summarized the discussion about the usability of lists (and
>>and other mutable types) as dictionary keys and put it into the
>>Python wiki.URL: http://www.python.org/moin/DictionaryKeys.
>>This summary might be used as a reference should the 'mutable
>>dictionary keys' issue come up again in c.l.py.
> I had a look and I think you should correct the followingr:
> Dictionary lookup with mutable types like lists is a source of
> unpleasant surprises for the programmer and therefore impossible in
Better, perhaps, to say:
Dictionary lookup with mutable types like lists can be a
source of unpleasant surprises for the programmer and
therefore not recommended in Python.
> It is not impossible in Python. It may be discouraged but it is not
> impossible since I have already done so.
If I discouraged you from shooting yourself in the foot would you do
some-people-just-won't-be-told-ly y'rs - steve
Steve Holden http://www.holdenweb.com/
Python Web Programming http://pydish.holdenweb.com/
Holden Web LLC +1 703 861 4237 +1 800 494 3119
More information about the Python-list