Red Black Tree implementation?

[Dan Stromberg]

I'm afraid I'm having some trouble with the module.  I've checked it into
my SVN at http://stromberg.dnsalias.org/svn/red-black-tree-mod/trunk/duncan

I have two versions of your tests in there now - "t" is minimally changed,
and test-red_black_tree_mod is pretty restructured to facilitate adding
more tests later.  I get the same problem with either version of the tests.

The problem I'm seeing is that the tree, when built from items, isn't
looking quite right.  I inserted a print(tree) into the for loop, and I'm
getting the following, where I expected the tree to grow by one element on
each iteration:

$ python t
6 False None None
6 False 3 None
6 False 3 15
6 False 3 15
6 False 3 11
6 False 3 11
6 False 3 11
11 False 6 15
11 False 6 15
11 False 6 15
11 False 6 15
11 False 6 15
11 False 6 15
11 False 6 15
11 False 6 15
11 False 6 15
11 False 6 15
11 False 6 15
11 False 6 15
11 False 6 15

Thoughts?

BTW, printing an empty tree seems to say "sentinel".  'not sure if that was
intended.

Thanks!



On Thu, May 9, 2013 at 6:52 AM, duncan smith <buzzard at invalid.invalid>wrote:

> On 09/05/13 02:40, Dan Stromberg wrote:
>
>> OK, I've got one copy of trees.py with md5
>> 211f80c0fe7fb9cb42feb9645b4b3f**fe.  You seem to be saying I should have
>> two though, but I don't know that I do...
>>
>>
> [snip]
>
> Yes, 211f80c0fe7fb9cb42feb9645b4b3f**fe is the correct checksum for the
> latest version. The previous version had an issue when adding non-distinct
> items (items that compare equal to items already in the tree). Cheers.
>
> Duncan
>
> --
> http://mail.python.org/**mailman/listinfo/python-list<http://mail.python.org/mailman/listinfo/python-list>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20130511/d95c7288/attachment.html>