On 08/12/2010 06:09 AM, Benjamin Root wrote:
> On Thu, Aug 12, 2010 at 10:13 AM, Ben North <b...@redfrontdoor.org
> <mailto:b...@redfrontdoor.org>> wrote:
>
>     Ben Root:
>      >Ben North:
>      >> Same kind of thing with
>      >> the kwarg 'color' instead of 'edgecolor', which is also fixed in my
>      >> second recent email.
>      >
>      > Looking through the code for bar(), I see the same thing occurs
>     for the
>      > 'color' keyword argument.  So I guess we should fix that as well.
>
>     Yes, the second of the emails I sent (pasted below) fixes the behaviour
>     for 'edgecolor' and 'color'.  Thanks for committing this.
>
>     Ben.
>
>     ------------------------------------------------------------------------
>
>
>     Date: 9 August 2010 09:42
>     Subject: Handle 'none' as color and edgecolor for bar()
>
>     Hi,
>
>     Update to my recent email: perhaps it would make sense to handle the
>     'color' argument in the same way, allowing hollow bars.  Combined patch
>     below.
>
>     Ben.
>
>
>
>     --- ORIG-axes.py        2010-07-06 15:43:35.000000000 +0100
>     +++ NEW-axes.py 2010-08-09 09:39:44.000256000 +0100
>     @@ -4575,15 +4575,17 @@
>             if len(linewidth) < nbars:
>                 linewidth *= nbars
>
>     -        if color is None:
>     -            color = [None] * nbars
>     +        if (color is None
>     +            or (is_string_like(color) and color.lower() == 'none')):
>     +            color = [color] * nbars
>             else:
>                 color = list(mcolors.colorConverter.to_rgba_array(color))
>                 if len(color) < nbars:
>                     color *= nbars
>
>     -        if edgecolor is None:
>     -            edgecolor = [None] * nbars
>     +        if (edgecolor is None
>     +            or (is_string_like(edgecolor) and edgecolor.lower() ==
>     'none')):
>     +            edgecolor = [edgecolor] * nbars
>             else:
>                 edgecolor =
>     list(mcolors.colorConverter.to_rgba_array(edgecolor))
>                 if len(edgecolor) < nbars:
>
>
>
> I did a little more checking to see if this was needed elsewhere and I
> think this is the wrong patch to apply.  It appears that
> colorConverter.to_rgba_array() might not be correctly handling the case
> of 'none'.  If one passes in a list of colors with some of them being
> 'none', everything works nicely.  However, if one passes in just 'none',
> then it returns an empty array.  Note that passing in ['none'] to
> .to_rgba_array() produces a length 1 array.
>
>  >>> mcolor.colorConvertor.to_rgba_array('none')
> array([], shape=(0, 4), dtype=float64)
>
>  >>> mcolor.colorConvertor.to_rgba_array(['none'])
> array([[ 0.,  0.,  0.,  0.]])
>
>  >>> mcolor.colorConvertor.to_rgba_array('r')
> array([[ 1.,  0.,  0.,  1.]])
>
> Should this be regarded as a bug?

Yes, 'none' should be handled uniformly by that method.  Thanks for 
tracking down actual source of the problem.  Fixing it there is the 
right thing to do.

Eric

>
> Ben Root
>
>
>
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