Fwd: [Nipy-devel] help with attributes

[Brian Hawthorne]

---------- Forwarded message ----------
From: Brian Hawthorne <brian.lee.hawthorne at gmail.com>
Date: May 17, 2006 5:29 PM
Subject: Re: [Nipy-devel] help with attributes
To: Jonathan Taylor <jonathan.taylor at stanford.edu>

hey jonathan,
i've changed the interface of the ParcelIterator a bit so that the attribute
called
labelset must be a sequence (and likewise for the labelset attribute of
SamplingGrid,
which get fed into the ParcelIterator).  looks like i left a few loose
ends.  there
were some cases where the labelset is set to a set object (which is
unordered).
i'll track this down and get back to you.
-brian

On 5/17/06, Jonathan Taylor <jonathan.taylor at stanford.edu> wrote:

> hi all,

need some help with attributes error message: i tried attached pca.py
(in lib/neuroimaging/statistics) example and got the following error:

thanks,

jonathan

--------------------
Traceback (most recent call last):
  File "pca.py", line 177, in ?
    a = p.components(which=[0,2,3])
  File "pca.py", line 109, in components
    outgrid = self.image.grid.subgrid(0)
  File
"/home/jtaylo/python/lib/python2.4/site-packages/neuroimaging/fmri/__init__.py",

line 99, in subgrid
    _grid.labelset = self.labelset
  File "/home/jtaylo/python/lib/python2.4/site-packages/attributes.py",
line 256, in set
    self.validate(value)
  File "/home/jtaylo/python/lib/python2.4/site-packages/attributes.py",
line 211, in validate
    if not self.isvalid(value): raise ProtocolOmission(
protocols.ProtocolOmission: attribute labelset implements (<class
protocols.Sequence at 0xb6ac62fc>,), value set([]) of type <type 'set'>
does not implement: ('__getitem__', '__getslice__')

-----------------------

p.s. does attribute offer the same thing traits does? if yes, should we
be using both? i am kind of used to traits by now...

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