As you have proposed, I modified the first line to:  
from visual import box, sphere, color, vector, rate
This lead to a clean script without any spyder warning and a successful 
run, and only ONE.  When I tried to rerun the script by pressing F5, 
nothing happen.  My conclusion is maybe spyder isn't friendly enought to 
some modules, such as Vpython. 


在 2012年7月25日星期三UTC+8上午11时36分54秒,David写道:
>
> The message you reported is just a warning, you can ignore it if you want. 
> Did you actually try running the script?
>
> The reason for the warning is the line "from visual import *", which 
> imports a whole bunch of things from the library, which spyder doesn't know 
> about. This means that spyder's code cannot do clever things like detecting 
> whether you have called an undefined function and displaying a warning 
> about it in the editor.
>
> On Tuesday, 24 July 2012 15:26:34 UTC+10, pai wrote:
>>
>> I'm have installed Python(x,y)-2.7.2.3 on Win7 32-bit system to draw a 
>> simple 3D animation with vpython <http://www.vpython.org/> module.  The 
>> script is shown as following, but the spyder complains with an exclamation 
>> mark at the first line of the script and hint shows that 'from visual 
>> import *' used; unable to detect undefined names.  The script runs 
>> pretty well in IDLE, so I'm sure the problem came from spyder.  Can anyone 
>> helps me, please ?
>>
>>
>>
>> from visual import * 
>>
>> floor = box (pos=(0,0,0), length=4, height=0.5, width=4, color=color.blue)
>>
>> ball = sphere (pos=(0,4,0), radius=1, color=color.red)
>>
>> ball.velocity = vector(0,-1,0)
>>
>> dt = 0.01
>>
>> while 1:
>>
>>   rate (100)
>>
>>   ball.pos = ball.pos + ball.velocity*dt
>>
>>   if ball.y < ball.radius:
>>
>>     ball.velocity.y = abs(ball.velocity.y)
>>
>>   else:
>>
>>     ball.velocity.y = ball.velocity.y - 9.8*dt
>>
>

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