I haven't yet figured out why, but the problem arises only if you set
"value" in the slider constructor. Remove it from the constructor, and
then after creating the slider execute this:
s1.value = 0.5
Bruce Sherwood
Lenore Horner wrote:
> I was being stupid and thought I could pull some of the color-sliders
> tricks into the regular controls package and have them for everything
> instead of having to copy and paste revised definitions all the time.
> After all, I could always re-install the controls.py and controls.pyc
> files if I mangled them irrepairably. Maybe not.
>
> I opened the package and just copied those to files back to the visual
> folder in site packages - replacing my mangled ones. No dice.
>
> I've wiped out Vpython and MacPython and reinstalled both. Still no
> good. Controls complains about a property not existing that I can
> plainly see in the code is defined.
>
> Any suggestions for where the wrong definition continues to lurk?
>
> Here's the error message.
>
> s1 = slider(pos=(-50,0,0), width=2, length=10, min=0, max=pi/4,
> value = 0.5, action=lambda: setangle(s1))
> File "/Library/Frameworks/Python.framework/Versions/2.6/lib/
> python2.6/site-packages/visual/controls.py", line 245, in __init__
> ctrl.__init__(self, args)
> File "/Library/Frameworks/Python.framework/Versions/2.6/lib/
> python2.6/site-packages/visual/controls.py", line 85, in __init__
> self.value = args['value']
> File "/Library/Frameworks/Python.framework/Versions/2.6/lib/
> python2.6/site-packages/visual/controls.py", line 283, in setvalue
> self.update(self.pos+self.axis*val*self.length/(self.max-self.min))
> AttributeError: 'slider' object has no attribute 'axis'
>
> I've tried it both with and without an explicit axis in the slider
> call to no avail.
>
> TIA,
> Lenore
>
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