Re: [Visualpython-users] Errors with new Visual

[Jonathan B. <jbr...@ea...>]

On Tue, 2004-07-27 at 13:25, Bruce Peterson wrote:

> Interestingly -- the Remove Programs in the Control panel doesn't remove 
> Visual.py
> After cleaning out the Visual directory, I installed Visual 2004-07-22 
> again (which doesn't have a visual.py) and ran my test program.
> This time the error message was:
>   << snip additional trace back into my code>>
>    File "C:\Python23\TSWork\DDV_GS005.py", line 1510, in show_axis
>      text=timetext,height=self.seldict['tlabelsize'],box=0,line=0,opacity=0.0)
>    File "C:\Python23\Lib\site-packages\visual\primitives.py", line 230, in 
> __init__
>      process_init_args_from_keyword_dictionary(self, keywords)
>    File "C:\Python23\Lib\site-packages\visual\primitives.py", line 37, in 
> process_init_args_from_keyword_dictionary
>      displayobject.color =  keywords['color']
> ArgumentError: Python argument types in
>      None.None(label, vector)
> did not match C++ signature:
>      None(visual::Label {lvalue}, boost::python::tuple)
> 


This error was generated because you assigned the color of a label
object to be a vector, when it wants a 3-tuple.

If this is a serious problem for you, then I can implement a workaround
that would accept any 3-element sequence to be a color, but I don't
think it is appropriate to use vectors for specifying a color.  

In the meantime, you can use the built-in function tuple(sequence) to
construct a tuple from any sequence (Visual's vectors are sequences), or
you can use the special member function vector.as_tuple() for a faster
conversion in performance-sensitive code.

HTH,
-Jonathan