On Tue, Oct 5, 2010 at 11:39 PM, Daniel Hyams <dhy...@gmail.com> wrote:
>
> I've run across a strange problem and perhaps I'm misusing something. I was
> trying to set up picking so that I can interact with plotted objects, and I
> get alot of error spew that looks like this:
>
> while checking <class 'matplotlib.lines.Line2D'>
> Traceback (most recent call last):
> File "C:\Python26\lib\site-packages\matplotlib\artist.py", line 241, in
> hitlist
> hascursor,info = self.contains(event)
> File "C:\Python26\lib\site-packages\matplotlib\lines.py", line 286, in
> contains
> path, affine = self._transformed_path.get_transformed_path_and_affine()
> AttributeError: 'NoneType' object has no attribute
> 'get_transformed_path_and_affine'
>
> This can be reproduced by the following code, even though there is no
> picking involved...just mouse motion. Is there possibly a workaround for
> this, or am I doing something wrong?
>
> import sys
> from pylab import *
>
> ax = subplot(111)
> ax.plot([0,1,2,3])
>
> def on_move(event):
> if event.inaxes:
> lst = ax.hitlist(event)
> print lst
>
> binding_id = connect('motion_notify_event', on_move)
>
>
> show()
It looks like Line2D.contains() was relying on some attributes that
were set by draw(). I'm not sure why those lines are not drawn (it
looks like some axis line?), but contains() shouldn't cause a
traceback regardless. I've fixed this in SVN. If you're not running
SVN, the patch is small, but it should be noted that the error message
you're seeing is purely cosmetic and shouldn't be causing any
problems.
Ryan
--
Ryan May
Graduate Research Assistant
School of Meteorology
University of Oklahoma
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