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Help and optimization hints, anyone?

Kim Petersen kim at lignus.dk
Fri Jan 23 09:48:49 EST 2004 
Den Fri, 23 Jan 2004 12:32:04 +0000. skrev John J. Lee:

> Kim Petersen <kim at lignus.dk> writes:
> 
>> I've worked on this table object a bit too long - and seem to have
>> stared too long at the code. Can someone see where it goes wrong in
>> the insertrow function?
> 
> I made a few comments before I realised it was a Tkinter question, so
> no answer, sorry!  Just some style hints.

thx. no problem tho - i should've remembered.
>> 
>> class UserDict:
> 
> Bad name -- UserDict is a standard library module.  In 2.2 or newer,
> you can subclass dict.  In 2.3, you also have the option of
> subclassing UserDict.DictMixin.  If you just want to implement part of
> the maping interface, just call your class something other than
> UserDict -- say SimpleDefaultDictBase.
> 

Actually i was planning to use the standard UserDict
(basically because a class is hashable and dict isn't) - i
got carried away and put some default handling in it as well - but
didn't rename ;-)

> 
> dict is also a bad name -- this is the name of the builtin dictionary
> type, which you've just clobbered (in the local scope).

Hmmm - isn't it called __dict__ ?

>> 
>>    def haskey(self,name): return self.dict.has_key(name)
> 
> Did you really mean to call it that?  The dict interface has a method
> .has_key(), not .haskey().

yup - oversight
> 
> 
>> class Cell(UserDict):
>>    defaults={"width": 0,"height": 0,"text": '',"color": "black","background": "white",
>>             "widgets": None}
> [...]
> 
> Haven't read much further, but it looks like you might be better off
> using attribute access rather than indexing.  In 2.2, use properties.
> Earlier, use __setattr__ / __getattr__ (make sure you read the docs).

this migrated from a regular dict which i had to drop because its
not hashable as mentioned earlier - next step __(get|set)attr__.
> 
> 
> John

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