On Friday 28 September 2007 07:36:23 am John Hunter wrote:
> On 9/27/07, Darren Dale <[EMAIL PROTECTED]> wrote:
> > Hi Eric, John,
> >
> > Have either of you been following this thread?
>
> I am now :-)
>
> As Eric suggests, None is overloaded vis-a-vis color handling, because
> for mpl properties it generally means do the default as defined by rc.
> For colors people often want to use None for "no color" which is why
> we added support for the string "None". Does this work in your use
> case Tom?
The above exchange was off-list, we're back on now. I think that would be what
Tom is looking for, but it doesnt work:
In [1]: plot([1,2])
Out[1]: [<matplotlib.lines.Line2D instance at 0x710cb0>]
In [2]: savefig('dsd.png', facecolor='None', edgecolor='None')
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
/home/darren/<ipython console> in <module>()
/usr/lib64/python2.5/site-packages/matplotlib/pyplot.py in savefig(*args,
**kwargs)
272 def savefig(*args, **kwargs):
273 fig = gcf()
--> 274 return fig.savefig(*args, **kwargs)
275 if Figure.savefig.__doc__ is not None:
276 savefig.__doc__ = dedent(Figure.savefig.__doc__)
/usr/lib64/python2.5/site-packages/matplotlib/figure.py in savefig(self,
*args, **kwargs)
768 kwargs[key] = rcParams['savefig.%s'%key]
769
--> 770 self.canvas.print_figure(*args, **kwargs)
771
772 def colorbar(self, mappable, cax=None, **kw):
/usr/lib64/python2.5/site-packages/matplotlib/backends/backend_qt4agg.py in
print_figure(self, *args, **kwargs)
153 self.update(l, self.renderer.height-t, w, h)
154
155 def print_figure(self, *args, **kwargs):
--> 156 FigureCanvasAgg.print_figure(self, *args, **kwargs)
157 self.draw()
/usr/lib64/python2.5/site-packages/matplotlib/backend_bases.py in
print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format,
**kwargs)
1194 edgecolor=edgecolor,
1195 orientation=orientation,
-> 1196 **kwargs)
1197 finally:
1198 self.figure.dpi.set(origDPI)
/usr/lib64/python2.5/site-packages/matplotlib/backends/backend_agg.py in
print_png(self, filename, *args, **kwargs)
415
416 def print_png(self, filename, *args, **kwargs):
--> 417 self.draw()
418 self.get_renderer()._renderer.write_png(str(filename))
419
/usr/lib64/python2.5/site-packages/matplotlib/backends/backend_qt4agg.py in
draw(self)
140 if DEBUG: print "FigureCanvasQtAgg.draw", self
141 self.replot = True
--> 142 FigureCanvasAgg.draw(self)
143 self.update()
144
/usr/lib64/python2.5/site-packages/matplotlib/backends/backend_agg.py in
draw(self)
377
378 self.renderer = self.get_renderer()
--> 379 self.figure.draw(self.renderer)
380
381 def get_renderer(self):
/usr/lib64/python2.5/site-packages/matplotlib/figure.py in draw(self,
renderer)
586 self.transFigure.freeze() # eval the lazy objects
587
--> 588 if self.frameon: self.figurePatch.draw(renderer)
589
590 for p in self.patches: p.draw(renderer)
/usr/lib64/python2.5/site-packages/matplotlib/patches.py in draw(self,
renderer)
198 #renderer.open_group('patch')
199 gc = renderer.new_gc()
--> 200 gc.set_foreground(self._edgecolor)
201 gc.set_linewidth(self._linewidth)
202 gc.set_alpha(self._alpha)
/usr/lib64/python2.5/site-packages/matplotlib/backend_bases.py in
set_foreground(self, fg, isRGB)
617 self._rgb = fg
618 else:
--> 619 self._rgb = colors.colorConverter.to_rgb(fg)
620
621 def set_graylevel(self, frac):
/usr/lib64/python2.5/site-packages/matplotlib/colors.py in to_rgb(self, arg)
277
278 except (KeyError, ValueError, TypeError), exc:
--> 279 raise ValueError('to_rgb: Invalid rgb arg "%s"\n%s' %
(str(arg), exc))
280 # Error messages could be improved by handling TypeError
281 # separately; but this should be rare and not too hard
ValueError: to_rgb: Invalid rgb arg "None"
invalid literal for float(): None
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