Sara Hatch wrote:
> I ran into a little problem when adding an axis span (both vertical and 
> horizontal) to my plot. When I use the optional keyword arguments, I get 
> an error message:
> 
> import pylab
> pylab.axhspan(0.25, 0.75, facecolor='0.5', alpha=0.5)
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "/lib/python2.5/site-packages/matplotlib/pyplot.py", line 1572, 
> in axhspan
>     ret =  gca().axhspan(*args, **kwargs)
>   File "/lib/python2.5/site-packages/matplotlib/axes.py", line 2883, in 
> axhspan
>     self._process_unit_info( [xmin, xmax], [ymin, ymax], **kwargs )
> TypeError: _process_unit_info() got an unexpected keyword argument 'alpha'
> 
> Granted, I can get the results I want using the .set_xxx() methods, but 
> my first method should have worked, right?
> 
> I've never filed a bug for matplotlib before, so I figured I'd send out 
> an email to the users-group first. 

Sara,

Thank you, that is indeed the right thing to do. In addition, please 
state what matplotlib version you are using.  Often, although not in 
this case, it is also critical to know what operating system you are 
using, and the numpy version.

You have definitely hit a bug, but it has been fixed--I don't see it in 
svn.  I don't know how long ago it was fixed.  A new release of mpl has 
just come out.  Can you upgrade?

Eric


> 
> Thanks,
> Sara
> 
> 
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