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Vpython error won't run any programs

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Join Date: Jun 2009

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johndb

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Vpython error won't run any programs

Nov 4th, 2009

I have downloaded vpython and try to run one of the examples included with the program.

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from visual import *
 
floor = box(length=4, height=0.5, width=4, color=color.blue)
 
ball = sphere(pos=(0,4,0), 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 < 1:
        ball.velocity.y = -ball.velocity.y
    else:
        ball.velocity.y = ball.velocity.y - 9.8*dt
from visual import *

floor = box(length=4, height=0.5, width=4, color=color.blue)

ball = sphere(pos=(0,4,0), 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 < 1:
        ball.velocity.y = -ball.velocity.y
    else:
        ball.velocity.y = ball.velocity.y - 9.8*dt

but this is the error I get

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Traceback (most recent call last):
  File "C:\Python26\Lib\site-packages\visual\examples\bounce.py", line 1
    from visual import *
  File "C:\Python26\lib\site-packages\visual\__init__.py", line 59
    import cvisual
AttributeError: 'Boost.Python.StaticProperty' object attribute '__doc__' is read-only
>>>
Traceback (most recent call last):
  File "C:\Python26\Lib\site-packages\visual\examples\bounce.py", line 1
    from visual import *
  File "C:\Python26\lib\site-packages\visual\__init__.py", line 59
    import cvisual
AttributeError: 'Boost.Python.StaticProperty' object attribute '__doc__' is read-only
>>>

, when I run it on my dell inspiron 1525 laptop with windows vista. I have tried it on another computer and have seen it work, but would like it to work on my laptop. I have the relatively latest 2.6.3 python installed on the laptop. And have tried uninstalling python and vpython a couple of times but the error continues does anyone have any ideas how to fix this?

Last edited by johndb; Nov 4th, 2009 at 5:03 pm.

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Join Date: Oct 2004

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vegaseat

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-1

Nov 4th, 2009

I assume you used the Windows installer
VPython-Win-Py2.6-5.12.exe
not quite sure if that needs numpy too. I don't use Python26.

The example works very well with Python25.

Last edited by vegaseat; Nov 4th, 2009 at 6:44 pm.

May 'the Google' be with you!

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Join Date: Jun 2009

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johndb

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Nov 5th, 2009

Yes I did as per the instructions on the vpython download page.

Last edited by johndb; Nov 5th, 2009 at 3:54 am.

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vegaseat

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DaniWeb's Hypocrite

Nov 5th, 2009

I have read that Vista has a nasty habit not to install certain files because of its childish security concerns, and it won't let the user know about it.

My advice, get rid of Vista as soon as you can.

May 'the Google' be with you!

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jlm699

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Knows where his Towel is

Nov 5th, 2009

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Originally Posted by vegaseat

My advice, get rid of Vista as soon as you can.

And if that's not an option make sure you're both installing and running all these things by right-clicking the executable and selecting "Run as Administrator"

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Join Date: Oct 2004

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vegaseat

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DaniWeb's Hypocrite

Nov 5th, 2009

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Originally Posted by jlm699

And if that's not an option make sure you're both installing and running all these things by right-clicking the executable and selecting "Run as Administrator"

Thanks for the info, hope it works for the OP. I have been sitting out Vista successfully so far, and probably will never have the pleasure to try this out. Eventually I will have to bite the bullet and use Windows 7 or Windows 7.1.

May 'the Google' be with you!