Re: [Visualpython-users] Visibility Bug? (Ooops)

[Bill W. <ww...@la...>]

Sorry Theo!  I guess the lesson is test your code before posting to the
list, no matter what.  At least Rodney had a "classic Python" issue, mine is
more just bone-headed.

In cutting and pasting the Frame class from my little module, I omitted the
declaration below, and that's the source of the problem.  It just creates a
'show' function that will work on any visual object, not just a Frame
instance.  I didn't notice the call to it buried in the class declaration
(funny that it reaches into email.py, otherwise!).

def show(obj, state=None):
    """Set the visible tag of an object, or, if an object.show() exists,
    (see Frame class below), propagate the call to set internal
    objects.  Call with a Boolean argument, or None to toggle current
    visibility state."""
    if hasattr(obj,'show'):
        obj.show(state)
    else:
        if state == None:
            obj.visible = not obj.visible
        else:
            obj.visible = state

There was another over simplification with my use of scene.kb, so I'm
attaching a complete example that should work without confusion, and I added
a demo of how I might do animation with it also.  Let me know if it gives
you any more headaches.

Bill

-----Original Message-----
From: vis...@li...
[mailto:vis...@li...] On Behalf Of Theo
DuBose
Sent: Wednesday, May 30, 2007 7:19 PM
To: vpython
Subject: Re: [Visualpython-users] Visibility Bug?

Bill,

Thanks, that seems like a good idea, but when I try to use it, I get the 
error:

Traceback (most recent call last):
  File "/Users/Theo/Documents/email2.py", line 7, in <module>
    f.show(0)
  File "/Users/Theo/Documents/email.py", line 11, in show
    show(obj,self.visible)
NameError: global name 'show' is not defined

I assume this is a problem with recursion; how do I fix this?

Thanks,
    Theo

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