Op 2005-10-12, George Sakkis schreef <[EMAIL PROTECTED]>:
> "Antoon Pardon" <[EMAIL PROTECTED]> wrote:
>> Comments are welcome:
>>
>> http://www.pardon-sleeuwaegen.be/antoon/avltree.html
>
> How about adding two shortcut methods, nextkey(k) and prevkey(k), to return
> the next and previous
> key respectively ? For instance nextkey would be equivalent to (untested):
I'll file this as: I'll probably never need it, so I'm going to resist
the temptation to add them now. If i find out I'm wrong, I can still do
so later.
> def nextkey(self, key):
> iter = self[key:]
> first = iter.next()
> if key not in self: return first
> else: return iter.next()
I think the if statement can be replaced by:
if not self.cmp(key, first) == 0: return first
> Also for consistency, nextvalue(k), prevvalue(k), nextitem(k), previtem(k)
> would be reasonable
> additions.
>
> And a question: what does step do if the keys are not integers since you
> restrict step to be integer
> ?
It skips keys/items/values.
>>> radio = [
... 'alfa', 'bravo', 'charlie', 'delta', 'echo', 'foxtrot', 'golf',
'hotel', 'india',
... 'juliet', 'kilo', 'lima', 'mike', 'november', 'oscar', 'papa',
'quebec', 'romeo',
... 'sierra', 'tango', 'uniform', 'victor', 'whiskey', 'x-ray',
'yankee', 'zulu' ]
>>>
>>> letters = 'abcdefghijklmnopqrstuvwxyz'
>>> from avltree import Tree
>>> t=Tree(zip(radio,letters))
>>> t.keys('choco',None,3)
['delta', 'golf', 'juliet', 'mike', 'papa', 'sierra', 'victor', 'yankee']
>>> t.values('bureau',None,4)
['c', 'g', 'k', 'o', 's', 'w']
What would you have in mind if step would have been a string here?
--
Antoon Pardon
--
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