visualpython-users

[Visualpython-users] C++ runtime error

[Tim <tim...@ta...>]

Hi,
I have downloaded and installed python 2.6.2 and the latest verson of 
VPython. When I try to run any of the sample VPython applications, I get 
the error:

Runtime Error

Program: C:\Python26\pythonw.exe

This application has requested the Runtime to terminate in an unusual 
way....


Can anyone help to troubleshoot this?

Thanks,

Tim


 

Re: [Visualpython-users] VPython on Snow Leopard

[Stef M. <s.m...@ru...>]

Joe Heafner wrote:
> Over the weekend, I upgraded one of my MacBook Pros to Snow Leopard.  
> FYI, VPython under Python 2.6.x seems to be working perfectly.
under winXp it also works perfect.

Stef

Re: [Visualpython-users] VPython on Snow Leopard

[Aaron T. <hpu...@gm...>]

I upgraded to Snow Leopard today. I've noticed one big improvement in  
the behavior of VIDLE that is a reflection of the new OS. In the past,  
Mac OS used a document creator code to identify the application that  
created a document. It used some hierarchy of rules to determine which  
application should open a document. The rules included the document  
creator code and the file extension and default settings. An excellent  
article about this issue and changes made to Snow Leopard is at:

http://db.tidbits.com/article/10537

But here's a summary. As of yesterday, my python files would sometimes  
open in BBedit, IDLE, or VIDLE. I had tried to set them to all open in  
VIDLE, but evidently I did not set this properly. Anyway, the problem  
had to do with the fact that some py files were created in BBedit,  
some were created in IDLE, and some were created recently in VIDLE.

Because Snow Leopard no longer looks at the document creator code, all  
of my .py files are now opening in VIDLE. I actually like this change  
to  Snow Leopard because I want to have all of my files with a certain  
extension open in the same application. However, some long-time Mac  
users are lamenting this change.

In this regard, I am now finally content in writing python programs in  
VPython. (In the past, I exclusively used BBedit as my editor and ran  
the programs from the command line.)

Aaron


On Sep 8, 2009, at 1:54 PM, Joe Heafner wrote:

> Over the weekend, I upgraded one of my MacBook Pros to Snow Leopard.
> FYI, VPython under Python 2.6.x seems to be working perfectly. Has
> anyone else tried it and found any problems?
>
> Joe Heafner (follow me on Twitter: twitter.com/heafnerj)
> email: heafnerj(at)gmail(dot)com URL: www(dot)SticksAndShadows(dot)com
>
>
>
>
>
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008  
> 30-Day
> trial. Simplify your report design, integration and deployment - and  
> focus on
> what you do best, core application coding. Discover what's new with
> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
> _______________________________________________
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> Vis...@li...
> https://lists.sourceforge.net/lists/listinfo/visualpython-users

[Visualpython-users] VPython on Snow Leopard

[Joe H. <hea...@gm...>]

Over the weekend, I upgraded one of my MacBook Pros to Snow Leopard.  
FYI, VPython under Python 2.6.x seems to be working perfectly. Has  
anyone else tried it and found any problems?

Joe Heafner (follow me on Twitter: twitter.com/heafnerj)
email: heafnerj(at)gmail(dot)com URL: www(dot)SticksAndShadows(dot)com

Re: [Visualpython-users] Problem integrating VPython5 and PyQt4

[Stef M. <s.m...@ru...>]

Bruce Sherwood wrote:
> I myself don't know anything about these other environments into which people 
> want to embed Visual, so someone other than me will have to look for a solution. 
> I thought that there had been some discussion a few months ago in this list by 
> people who had successfully embedded Visual in some larger environment?
>
>   
yep in wxPython, see
http://mientki.ruhosting.nl/data_www/pylab_works/pw_vpython_docking.html

cheers,
Stef
> Bruce Sherwood
>
> Matteo Malosio wrote:
>   
>> Hi,
>> no good news. I have tried to create an independent thread to manage 
>> only VPython, but it didn't work :-)
>>
>> I really don't know how to solve the preblem.
>>
>> Thank you
>>
>> Matteo
>>
>>
>>
>> Piotr Byzia ha scritto:
>>     
>>>> Dears,
>>>> I've a problem integrating VPython5 with PyQt4. If anyone can help me... 
>>>> thanks a lot!
>>>>
>>>>
>>>> Here is the problem:
>>>>
>>>> The following code should show a PyQt4 form together with a VPython 
>>>> scene.
>>>> Using VPython3 it works correctly, while useing VPython5 it crashes.
>>>> Does anyone has experience on facing this problem?
>>>> I would be very grateful if anyone can help me.
>>>>
>>>> from visual import *
>>>> from PyQt4 import QtCore, QtGui
>>>> import sys
>>>>
>>>> class MainWindow(QtGui.QMainWindow):
>>>> def __init__(self):
>>>> QtGui.QDialog.__init__(self)
>>>>
>>>> scene.visible = 1
>>>> b = box()
>>>>
>>>> app = QtGui.QApplication(sys.argv)
>>>> window = MainWindow()
>>>> window.show()
>>>> sys.exit(app.exec_())
>>>>
>>>>
>>>> replacing
>>>>
>>>> scene.visible = 1
>>>>
>>>>
>>>> with
>>>>
>>>> scene.visible = 0
>>>>
>>>>
>>>> it works and the Qt window is shown also with VPython5 (but the scene 
>>>> can't be obviously seen!).
>>>>         
>>> Hi Matteo,
>>>
>>> Recently, I also tried to embed VPython window into QT using PyQT, but 
>>> also with no luck :(
>>> Have you discovered anything new on that matter?
>>>
>>> Below is my code:
>>>
>>> from PyQt4 import QtCore, QtGui
>>>
>>> from visual import *
>>>
>>> class Ball(QtGui.QGraphicsItem):
>>>     def __init__(self):
>>>         super(Ball, self).__init__()
>>>
>>>         self.shape = sphere(pos=(17.047, 14.099, 3.625),radius=1)
>>>
>>>
>>> if __name__ == '__main__':
>>>
>>>     app = QtGui.QApplication(sys.argv)
>>>
>>>     scene_qt = QtGui.QGraphicsScene()
>>>     scene_qt.setSceneRect(-300, -300, 600, 600)
>>>     scene_qt.setItemIndexMethod(QtGui.QGraphicsScene.NoIndex)
>>>     
>>>     # scene2 = display(title='Graph of position', width=600, 
>>> height=200, center=(5,0,0), background=(0,1,1))
>>>     
>>>     ball = Ball()
>>>     scene_qt.addItem(ball)
>>>     
>>>     # ball = sphere(pos=(17.047, 14.099, 3.625),radius=1)
>>>
>>>     view = QtGui.QGraphicsView(scene_qt)
>>>     view.show()
>>>
>>>     sys.exit(app.exec_())
>>>
>>>
>>>
>>> Best,
>>> Piotr Byzia
>>>       
>> -- 
>> -------------------------------------------------------
>> Matteo Malosio, Eng.
>> Researcher
>> ITIA-CNR (www.itia.cnr.it)
>> Institute of Industrial Technologies and Automation
>> National Research Council
>> via Bassini 15, 20133 MILANO, ITALY
>> Ph:  +39 0223699978
>> Fax: +39 0223699925
>> e-mail: mat...@it...
>> -------------------------------------------------------
>>
>>
>> ------------------------------------------------------------------------
>>
>> ------------------------------------------------------------------------------
>> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day 
>> trial. Simplify your report design, integration and deployment - and focus on 
>> what you do best, core application coding. Discover what's new with 
>> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
>>
>>
>> ------------------------------------------------------------------------
>>
>> _______________________________________________
>> Visualpython-users mailing list
>> Vis...@li...
>> https://lists.sourceforge.net/lists/listinfo/visualpython-users
>>     
>
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day 
> trial. Simplify your report design, integration and deployment - and focus on 
> what you do best, core application coding. Discover what's new with 
> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
> _______________________________________________
> Visualpython-users mailing list
> Vis...@li...
> https://lists.sourceforge.net/lists/listinfo/visualpython-users
>
>
>   

Re: [Visualpython-users] Problem integrating VPython5 and PyQt4

[Bruce S. <Bru...@nc...>]

I myself don't know anything about these other environments into which people 
want to embed Visual, so someone other than me will have to look for a solution. 
I thought that there had been some discussion a few months ago in this list by 
people who had successfully embedded Visual in some larger environment?

Bruce Sherwood

Matteo Malosio wrote:
> Hi,
> no good news. I have tried to create an independent thread to manage 
> only VPython, but it didn't work :-)
> 
> I really don't know how to solve the preblem.
> 
> Thank you
> 
> Matteo
> 
> 
> 
> Piotr Byzia ha scritto:
>>> Dears,
>>> I've a problem integrating VPython5 with PyQt4. If anyone can help me... 
>>> thanks a lot!
>>>
>>>
>>> Here is the problem:
>>>
>>> The following code should show a PyQt4 form together with a VPython 
>>> scene.
>>> Using VPython3 it works correctly, while useing VPython5 it crashes.
>>> Does anyone has experience on facing this problem?
>>> I would be very grateful if anyone can help me.
>>>
>>> from visual import *
>>> from PyQt4 import QtCore, QtGui
>>> import sys
>>>
>>> class MainWindow(QtGui.QMainWindow):
>>> def __init__(self):
>>> QtGui.QDialog.__init__(self)
>>>
>>> scene.visible = 1
>>> b = box()
>>>
>>> app = QtGui.QApplication(sys.argv)
>>> window = MainWindow()
>>> window.show()
>>> sys.exit(app.exec_())
>>>
>>>
>>> replacing
>>>
>>> scene.visible = 1
>>>
>>>
>>> with
>>>
>>> scene.visible = 0
>>>
>>>
>>> it works and the Qt window is shown also with VPython5 (but the scene 
>>> can't be obviously seen!).
>>
>> Hi Matteo,
>>
>> Recently, I also tried to embed VPython window into QT using PyQT, but 
>> also with no luck :(
>> Have you discovered anything new on that matter?
>>
>> Below is my code:
>>
>> from PyQt4 import QtCore, QtGui
>>
>> from visual import *
>>
>> class Ball(QtGui.QGraphicsItem):
>>     def __init__(self):
>>         super(Ball, self).__init__()
>>
>>         self.shape = sphere(pos=(17.047, 14.099, 3.625),radius=1)
>>
>>
>> if __name__ == '__main__':
>>
>>     app = QtGui.QApplication(sys.argv)
>>
>>     scene_qt = QtGui.QGraphicsScene()
>>     scene_qt.setSceneRect(-300, -300, 600, 600)
>>     scene_qt.setItemIndexMethod(QtGui.QGraphicsScene.NoIndex)
>>     
>>     # scene2 = display(title='Graph of position', width=600, 
>> height=200, center=(5,0,0), background=(0,1,1))
>>     
>>     ball = Ball()
>>     scene_qt.addItem(ball)
>>     
>>     # ball = sphere(pos=(17.047, 14.099, 3.625),radius=1)
>>
>>     view = QtGui.QGraphicsView(scene_qt)
>>     view.show()
>>
>>     sys.exit(app.exec_())
>>
>>
>>
>> Best,
>> Piotr Byzia
> 
> -- 
> -------------------------------------------------------
> Matteo Malosio, Eng.
> Researcher
> ITIA-CNR (www.itia.cnr.it)
> Institute of Industrial Technologies and Automation
> National Research Council
> via Bassini 15, 20133 MILANO, ITALY
> Ph:  +39 0223699978
> Fax: +39 0223699925
> e-mail: mat...@it...
> -------------------------------------------------------
> 
> 
> ------------------------------------------------------------------------
> 
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day 
> trial. Simplify your report design, integration and deployment - and focus on 
> what you do best, core application coding. Discover what's new with 
> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> Visualpython-users mailing list
> Vis...@li...
> https://lists.sourceforge.net/lists/listinfo/visualpython-users

Re: [Visualpython-users] Problem integrating VPython5 and PyQt4

[Matteo M. <mat...@it...>]

Hi,
no good news. I have tried to create an independent thread to manage 
only VPython, but it didn't work :-)

I really don't know how to solve the preblem.

Thank you

Matteo



Piotr Byzia ha scritto:
>> Dears,
>> I've a problem integrating VPython5 with PyQt4. If anyone can help me... 
>> thanks a lot!
>>
>>
>> Here is the problem:
>>
>> The following code should show a PyQt4 form together with a VPython 
>> scene.
>> Using VPython3 it works correctly, while useing VPython5 it crashes.
>> Does anyone has experience on facing this problem?
>> I would be very grateful if anyone can help me.
>>
>> from visual import *
>> from PyQt4 import QtCore, QtGui
>> import sys
>>
>> class MainWindow(QtGui.QMainWindow):
>> def __init__(self):
>> QtGui.QDialog.__init__(self)
>>
>> scene.visible = 1
>> b = box()
>>
>> app = QtGui.QApplication(sys.argv)
>> window = MainWindow()
>> window.show()
>> sys.exit(app.exec_())
>>
>>
>> replacing
>>
>> scene.visible = 1
>>
>>
>> with
>>
>> scene.visible = 0
>>
>>
>> it works and the Qt window is shown also with VPython5 (but the scene 
>> can't be obviously seen!).
>
> Hi Matteo,
>
> Recently, I also tried to embed VPython window into QT using PyQT, but 
> also with no luck :(
> Have you discovered anything new on that matter?
>
> Below is my code:
>
> from PyQt4 import QtCore, QtGui
>
> from visual import *
>
> class Ball(QtGui.QGraphicsItem):
>     def __init__(self):
>         super(Ball, self).__init__()
>
>         self.shape = sphere(pos=(17.047, 14.099, 3.625),radius=1)
>
>
> if __name__ == '__main__':
>
>     app = QtGui.QApplication(sys.argv)
>
>     scene_qt = QtGui.QGraphicsScene()
>     scene_qt.setSceneRect(-300, -300, 600, 600)
>     scene_qt.setItemIndexMethod(QtGui.QGraphicsScene.NoIndex)
>     
>     # scene2 = display(title='Graph of position', width=600, 
> height=200, center=(5,0,0), background=(0,1,1))
>     
>     ball = Ball()
>     scene_qt.addItem(ball)
>     
>     # ball = sphere(pos=(17.047, 14.099, 3.625),radius=1)
>
>     view = QtGui.QGraphicsView(scene_qt)
>     view.show()
>
>     sys.exit(app.exec_())
>
>
>
> Best,
> Piotr Byzia

-- 
-------------------------------------------------------
Matteo Malosio, Eng.
Researcher
ITIA-CNR (www.itia.cnr.it)
Institute of Industrial Technologies and Automation
National Research Council
via Bassini 15, 20133 MILANO, ITALY
Ph:  +39 0223699978
Fax: +39 0223699925
e-mail: mat...@it...
-------------------------------------------------------

Re: [Visualpython-users] Problem integrating VPython5 and PyQt4

[Piotr B. <pio...@gm...>]

> Dears,
> I've a problem integrating VPython5 with PyQt4. If anyone can help  
> me...
> thanks a lot!
>
>
> Here is the problem:
>
> The following code should show a PyQt4 form together with a VPython  
> scene.
> Using VPython3 it works correctly, while useing VPython5 it crashes.
> Does anyone has experience on facing this problem?
> I would be very grateful if anyone can help me.
>
> from visual import *
> from PyQt4 import QtCore, QtGui
> import sys
>
> class MainWindow(QtGui.QMainWindow):
> def __init__(self):
> QtGui.QDialog.__init__(self)
>
> scene.visible = 1
> b = box()
>
> app = QtGui.QApplication(sys.argv)
> window = MainWindow()
> window.show()
> sys.exit(app.exec_())
>
>
> replacing
>
> scene.visible = 1
>
>
> with
>
> scene.visible = 0
>
>
> it works and the Qt window is shown also with VPython5 (but the scene
> can't be obviously seen!).

Hi Matteo,

Recently, I also tried to embed VPython window into QT using PyQT, but  
also with no luck :(
Have you discovered anything new on that matter?

Below is my code:

from PyQt4 import QtCore, QtGui

from visual import *

class Ball(QtGui.QGraphicsItem):
     def __init__(self):
         super(Ball, self).__init__()

         self.shape = sphere(pos=(17.047, 14.099, 3.625),radius=1)


if __name__ == '__main__':

     app = QtGui.QApplication(sys.argv)

     scene_qt = QtGui.QGraphicsScene()
     scene_qt.setSceneRect(-300, -300, 600, 600)
     scene_qt.setItemIndexMethod(QtGui.QGraphicsScene.NoIndex)

     # scene2 = display(title='Graph of position', width=600,  
height=200, center=(5,0,0), background=(0,1,1))

     ball = Ball()
     scene_qt.addItem(ball)

     # ball = sphere(pos=(17.047, 14.099, 3.625),radius=1)

     view = QtGui.QGraphicsView(scene_qt)
     view.show()

     sys.exit(app.exec_())



Best,
Piotr Byzia

Re: [Visualpython-users] vector converted to numpy.ndarray

[Bruce S. <Bru...@nc...>]

The issue isn't how to find a workaround; this is a real bug. Thanks, Aaron, for 
reporting it. Many similar problems were solved, but we missed this one. The 
problem is that when the old Numeric module was replaced by numpy, many 
operations that used to return ordinary types suddenly now returned things like 
numpy.float64, and some fancy footwork was required to get around problems of 
the kind you found.

Bruce Sherwood

Symion wrote:
> Aaron Miller wrote:
>> Hi VPython folks,
>>
>> I was attempting to run the contributed script 
>> http://vpython.org/contributed/bodies.py and I get an error... I have 
>> tracked it down to the fact that the dot product dot(a,b) between two 
>> vectors returns a type of numpy.float64 and when I multiply this by a 
>> vector I get back an array instead of a vector.
>>
>> A simple example that generates an error for me:
>>
>> from visual import *
>> a=vector(1,0,0)
>> b=dot(a,a)*a
>> b.mag
>>
>> Here is the error:
>> Traceback (most recent call last):
>>   File "Untitled", line 4
>>     b.mag
>> AttributeError: 'numpy.ndarray' object has no attribute 'mag'
>>
>> Of course, by assigning b as vector(dot(a,a)*a) we fix this, but it 
>> seems this should not be needed.  Is this a bug?
>>
>> Thanks,
>> Aaron
>> Python 2.6.2 with VPython 5.12
>>
>> ------------------------------------------------------
>> Aaron J. Miller, Ph.D.
>> Department of Physics
>> 328 Palenske Hall
>> Albion College, Albion, MI 49224
>> ------------------------------------------------------------------------
>> _______________________________________________
>> Visualpython-users mailing list
>> Vis...@li...
>> https://lists.sourceforge.net/lists/listinfo/visualpython-users
>>   
> 
> Try this.
> 
> from visual import *
> a=vector(1,0,0)
> b=vector(dot(a,a)*a)
> b.mag
> 
> Symion

Re: [Visualpython-users] vector converted to numpy.ndarray

[Symion <kn...@ip...>]

Aaron Miller wrote:
> Hi VPython folks,
>
> I was attempting to run the contributed script 
> http://vpython.org/contributed/bodies.py and I get an error... I have 
> tracked it down to the fact that the dot product dot(a,b) between two 
> vectors returns a type of numpy.float64 and when I multiply this by a 
> vector I get back an array instead of a vector.
>
> A simple example that generates an error for me:
>
> from visual import *
> a=vector(1,0,0)
> b=dot(a,a)*a
> b.mag
>
> Here is the error:
> Traceback (most recent call last):
>   File "Untitled", line 4
>     b.mag
> AttributeError: 'numpy.ndarray' object has no attribute 'mag'
>
> Of course, by assigning b as vector(dot(a,a)*a) we fix this, but it 
> seems this should not be needed.  Is this a bug?
>
> Thanks,
> Aaron
> Python 2.6.2 with VPython 5.12
>
> ------------------------------------------------------
> Aaron J. Miller, Ph.D.
> Department of Physics
> 328 Palenske Hall
> Albion College, Albion, MI 49224
> ------------------------------------------------------------------------
>
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day 
> trial. Simplify your report design, integration and deployment - and focus on 
> what you do best, core application coding. Discover what's new with 
> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
> ------------------------------------------------------------------------
>
> _______________________________________________
> Visualpython-users mailing list
> Vis...@li...
> https://lists.sourceforge.net/lists/listinfo/visualpython-users
>   

Try this.

from visual import *
a=vector(1,0,0)
b=vector(dot(a,a)*a)
b.mag

Symion

[Visualpython-users] vector converted to numpy.ndarray

[Aaron M. <ajm...@al...>]

Hi VPython folks,

I was attempting to run the contributed script
http://vpython.org/contributed/bodies.py and I get an error... I have
tracked it down to the fact that the dot product dot(a,b) between two
vectors returns a type of numpy.float64 and when I multiply this by a vector
I get back an array instead of a vector.

A simple example that generates an error for me:

from visual import *
a=vector(1,0,0)
b=dot(a,a)*a
b.mag

Here is the error:
Traceback (most recent call last):
  File "Untitled", line 4
    b.mag
AttributeError: 'numpy.ndarray' object has no attribute 'mag'

Of course, by assigning b as vector(dot(a,a)*a) we fix this, but it seems
this should not be needed.  Is this a bug?

Thanks,
Aaron
Python 2.6.2 with VPython 5.12

------------------------------------------------------
Aaron J. Miller, Ph.D.
Department of Physics
328 Palenske Hall
Albion College, Albion, MI 49224

Re: [Visualpython-users] Linux debian package for vpython5?

[Tony R. <To...@br...>]

There is a package in sid, but it's deps are for python 2.5 not 2.6,
you have to edit that to install to ubuntu, but I think it worked fine
in testing/squeeze

On Sep 4, 2009, at 2:41 AM, "Adrian Martÿffffednez" <adriangeologo@yahoo.e
s> wrote:

> Some one have the debian packages for vpython5.   I have problems of
> dependence to compile de source. To distribute vpython for real free
> peoples working with Linux is better to use .deb files and redhat
> packages!
>
>
>
>
>
> ---
> ---
> ---
> ---------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008
> 30-Day
> trial. Simplify your report design, integration and deployment - and
> focus on
> what you do best, core application coding. Discover what's new with
> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
> _______________________________________________
> Visualpython-users mailing list
> Vis...@li...
> https://lists.sourceforge.net/lists/listinfo/visualpython-users
>
>


Tony Risinger
Application Development Specialist
Tel: 507-535-7563 | Fax: 507-292-5747 | Toll Free: 866-241-0639

To...@Br...

http://www.brokerbin.com/

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[Visualpython-users] exit=false with gcurve

[Adrian M. <adr...@ya...>]

I’m using boa-constructor to create GUI in python with wxpython, and Vpython for 3D and 2D graph. Using the property “exit=false” for “display”  allow me to continue with may nice GUI. The problem is that with gcurve this property doesn’t work! 


I’m wrong, some ideas?

Below is the code… (you need to install wxpython) (tested in Linux debian python2.5 and vpython 3.n; and in windows python2.6 vpython5)

Build with boa-constructor
need wxpython

File:   Frame1.py
______________________________________________
#Boa:Frame:Frame1

import wx
from visual import *
from visual.graph import *


def create(parent):
    return Frame1(parent)

[wxID_FRAME1] = [wx.NewId() for _init_ctrls in range(1)]

[wxID_FRAME1MENU1TEST2D, wxID_FRAME1MENU1TEST3D,
] = [wx.NewId() for _init_coll_menu1_Items in range(2)]

class Frame1(wx.Frame):
    def _init_utils(self):
        # generated method, don't edit
        self.menu1 = wx.Menu(title='')

        self.menuBar1 = wx.MenuBar()

        self._init_coll_menu1_Items(self.menu1)
        self._init_coll_menuBar1_Menus(self.menuBar1)


    def _init_coll_menuBar1_Menus(self, parent):
        # generated method, don't edit

        parent.Append(menu=self.menu1, title=u'File')

    def _init_coll_menu1_Items(self, parent):
        # generated method, don't edit

        parent.Append(help='', id=wxID_FRAME1MENU1TEST3D, kind=wx.ITEM_NORMAL,
              text=u'test 3D')
        parent.Append(help='', id=wxID_FRAME1MENU1TEST2D, kind=wx.ITEM_NORMAL,
              text=u'test 2D')
        self.Bind(wx.EVT_MENU, self.OnMenu1Test3dMenu,
              id=wxID_FRAME1MENU1TEST3D)
        self.Bind(wx.EVT_MENU, self.OnMenu1Test2dMenu,
              id=wxID_FRAME1MENU1TEST2D)

    def _init_ctrls(self, prnt):
        # generated method, don't edit
        wx.Frame.__init__(self, id=wxID_FRAME1, name='', parent=prnt,
              pos=wx.Point(486, 335), size=wx.Size(400, 250),
              style=wx.DEFAULT_FRAME_STYLE, title='Frame1')
        self._init_utils()
        self.SetClientSize(wx.Size(392, 216))
        self.SetMenuBar(self.menuBar1)

    def __init__(self, parent):
        self._init_ctrls(parent)

# &&&&&&&&&&&&&&&&&&&&&&& That is the Vpython Code &&&&&&&&&&&&&&

    def OnMenu1Test3dMenu(self, event):
        #Work

        scene=display(title='Un ejemplo')
        scene.exit=false
       
        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)


    def OnMenu1Test2dMenu(self, event):
        #Work but close the GUI at the end!
        oscillation = gdisplay(xtitle='Time', ytitle='Response')
        oscillation.exit=false #don't work
        funct1 = gcurve(color=color.cyan)
        funct2 = gvbars(delta=0.5, color=color.red)
        funct3 = gdots(color=color.yellow)

        for t in arange(-30, 74, 1):
            funct1.plot( pos=(t, 5.0+5.0*cos(-0..2*t)*exp(0.015*t)) )
            funct2.plot( pos=(t, 2.0+5.0*cos(-0.1*t)*exp(0.015*t)) )
            funct3.plot( pos=(t, 5.0*cos(-0.03*t)*exp(0.015*t)) )


________________________________________________


File:   App1.py    (run this file..)
______________________________________________
#!/usr/bin/env python
#Boa:App:BoaApp

import wx

import Frame1

modules ={'Frame1': [1, 'Main frame of Application', u'Frame1.py']}

class BoaApp(wx.App):
    def OnInit(self):
        self.main = Frame1.create(None)
        self.main.Show()
        self.SetTopWindow(self.main)
        return True

def main():
    application = BoaApp(0)
    application.MainLoop()

if __name__ == '__main__':
    main()



      

[Visualpython-users] Linux debian package for vpython5?

[Adrian M. <adr...@ya...>]

Some one have the debian packages for vpython5.   I have problems of dependence to compile de source. To distribute vpython for real free peoples working with Linux is better to use .deb files and redhat packages!


      

[Visualpython-users] Instructional videos

[Bruce S. <Bru...@nc...>]

Ruth Chabay's Physics Education Research graduate students at NCSU have been 
doing R&D on how best to teach computational modeling. One of their activities 
is that they are starting to post short videos to teach basic VPython concepts. 
You can find these at

	http://www.youtube.com/vpythonvideos

This is a new work in progress, and you are encouraged to leave comments in the 
comment area about the videos. We think that these little videos may be much 
better than written instructions for some aspects of teaching computation.

Bruce Sherwood

Re: [Visualpython-users] error compiling visual-python in slackware

[Bruce S. <Bru...@nc...>]

The error message is pretty clear: You need to install the Boost thread 
development package.

Bruce Sherwood

Lindeval Fernandes de Lima wrote:
> 
> Dears,
> 
>    I'm get error compiling visual-python. My distribution is Slackware 
> 12.2 and my version python is 6.2. Below follow the output error:
> 
>   Compiling ./gtk2/font_renderer.cpp ...
>   Compiling ./gtk2/render_surface.cpp ...
>   Compiling ./python/wrap_display_kernel.cpp ...
>   Linking cvisualmodule.la ...
>   make[1]: *** [cvisualmodule.la] Error 1
>   make[1]: Leaving directory `/home/lindeval/visual-5.12_release/src'
>   make: *** [all-recursive] Error 1
> 
>  the last lines of file src/build.log:
> 
> /usr/lib/gcc/i486-slackware-linux/4.2.4/../../../../i486-slackware-linux/bin/ld: 
> cannot find -lboost_thread
> collect2: ld returned 1 exit status
> 
> 
> tank you for any help!!

[Visualpython-users] error compiling visual-python in slackware

[Lindeval F. de L. <lin...@ya...>]

Dears,

   I'm get error compiling visual-python. My distribution is Slackware 12.2 and my version python is 6.2. Below follow the output error:

  Compiling ./gtk2/font_renderer.cpp ...
  Compiling ./gtk2/render_surface.cpp ...
  Compiling ./python/wrap_display_kernel.cpp ...
  Linking cvisualmodule.la ...
  make[1]: *** [cvisualmodule.la] Error 1
  make[1]: Leaving directory `/home/lindeval/visual-5.12_release/src'
  make: *** [all-recursive] Error 1

 the last lines of file src/build.log:

/usr/lib/gcc/i486-slackware-linux/4.2.4/../../../../i486-slackware-linux/bin/ld: cannot find -lboost_thread
collect2: ld returned 1 exit status


tank you for any help!!







      ____________________________________________________________________________________
Veja quais são os assuntos do momento no Yahoo! +Buscados
http://br.maisbuscados.yahoo.com

Re: [Visualpython-users] Installing VPython5 on Ubuntu

[Bruce S. <Bru...@nc...>]

The issue is that until Ubuntu 9.04, the standard place for 3rd-party 
modules such as Visual was /usr/lib/python2.6/site-packages if you were 
using /usr/bin/python2.6, or else /usr/local/lib/python2.6/site-packages 
if you were using /usr/local/bin/python2.6.

As a result, the "autoconfigure" script for VPython places the Visual 
module in one of these site-packages locations, depending on whether in 
your configure statement you say "--prefix=/usr" or 
"--prefix=/usr/local" (the latter being the default).

However, starting with Ubuntu 9.04, 3rd-party packages are apparently 
supposed to be somewhere else (dist-packages), and there seems to be 
some confusion about what is the new convention. More seriously, 
site-packages is apparently no longer on Python's module search path. 
That is, Python doesn't look in site-packages to find modules. This is a 
problem because at present the autoconfigure procedure will install 
Visual in the specified site-packages, not dist-packages.

A possible scheme to deal with this is outlined in the comments you 
quote. The configure statement

PYTHON=/usr/bin/python ../vpython-core2/configure --prefix=/usr/local/lib

says "I'm using the python found in /usr/bin (which in Ubuntu 9.04 is 
equivalent to /usr/bin/python2.6), but I want the Visual module to be 
put in /usr/local/lib/site-packages".

And then you need to copy vpython-core2/src/gtk2/site-packages.pth to
/usr/lib/python2.6/dist-packages to put 
/usr/local/lib/python2.6/site-packages on the Python search path.

The contents of vpython-core2/src/gtk2/site-packages.pth is simply 
/usr/local/lib/python2.6/site-packages.

Bruce Sherwood

Matteo Malosio wrote:
> I'm trying to install VPython5 on Ubuntu but I've some doubt about the 
> "configure" process.
> I can't understand what is reported in the Install file:
> 
> "    There have been significant changes in where 3rd-party software is 
> stored on
>     Ubuntu 9.04. You probably want to use /usr/bin/python2.6 but store 
> the Visual
>     module in /usr/local/lib/python2.6/site-packages. To configure, do 
> this in a
>     folder parallel to vpython-core2:
>    
>     PYTHON=/usr/bin/python ../vpython-core2/configure 
> --prefix=/usr/local/lib
>    
>     You will also need to copy vpython-core2/src/gtk2/site-packages.pth to
>     /usr/lib/python2.6/dist-packages to put 
> /usr/local/lib/python2.6/site-packages
>     on the Python search path."
> 
> 
> Thank you!
> 
> Matteo
> 
> 
> 
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day 
> trial. Simplify your report design, integration and deployment - and focus on 
> what you do best, core application coding. Discover what's new with 
> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
> _______________________________________________
> Visualpython-users mailing list
> Vis...@li...
> https://lists.sourceforge.net/lists/listinfo/visualpython-users

Re: [Visualpython-users] Problems with exception handling in vpython on Linux

[Jim T. <jt...@mi...>]

I'm running Ubuntu 9.04 AMD64.  I do not get the errors you describe 
running visual 5.1 built from source.  I did have an older version of 
visual installed from the repositories before that so perhaps there is 
some dependency that is installed on my system that configure did not 
catch on yours?  However I do remember spending some time satisfying the 
dependencies to build it.

JT


Guenter Schneider wrote:
> I ran into a number of problems with vpython on Linux which appear to be 
> all related. The problems do not happen in Windows. My system is ubuntu 
> 9.04, vpython 5.12 compiled from source (5.11 gives identical results).
>
> Thee common feature I see on Linux is, whenever vpython raises an 
> exception, python seg. faults.
>
> Example 1:
>
> In [1]: from visual import *
>
> In [2]: a = vector(1,2,3)
>
> In [3]: for i in a:
>     ...:     print i
>     ...:
>     ...:
> 1.0
> 2.0
> 3.0
> Segmentation fault
> ~ $
>
> but the following works:
>
> Example 2:
>
> In [1]: from visual import *
>
> In [2]: a = vector(1,2,3)
>
> In [3]: for i in a:
>     ...:     print i
>     ...:     if i>2:
>     ...:         break
>     ...:
>     ...:
> 1.0
> 2.0
> 3.0
>
> This seems to point to the raising a StopIteration exception as the 
> problem point.
>
> Example 3:
> In [1]: from visual import *
>
> In [2]: a = [1,2,3]
>
> In [3]: mag2(a)
> Out[3]: 14.0
>
> In [4]: a = [1,2,'x']
>
> In [5]: mag2(a)
> Segmentation fault
> ~ $
>
> It should have raised a TypeError as in this case
>
> In [1]: from visual import *
>
> In [2]: a = [1,2,'x']
>
> In [3]: print a[0]*a[0]+a[1]*a[1]+a[2]*a[2]
> ------> print(a[0]*a[0]+a[1]*a[1]+a[2]*a[2])
> ---------------------------------------------------------------------------
> TypeError                                 Traceback (most recent call last)
>
> Finally this fails as well:
>
> Example 5:
> In [1]: from visual import *
>
> In [2]: quit()
> Do you really want to exit ([y]/n)?
> Segmentation fault
> ~ $
>
> This error  is probably caused by a SystemExit exception.
>
> Is something wrong with my install? Hard to see how to go wrong there, 
> it's configure, make, make install and taking care of site-packages in 
> ubuntu 9.04.
>
> Thank you for your help and the great work.
>
> Guenter Schneider
>
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day 
> trial. Simplify your report design, integration and deployment - and focus on 
> what you do best, core application coding. Discover what's new with 
> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
> _______________________________________________
> Visualpython-users mailing list
> Vis...@li...
> https://lists.sourceforge.net/lists/listinfo/visualpython-users
>   

[Visualpython-users] Installing VPython5 on Ubuntu

[Matteo M. <mat...@it...>]

I'm trying to install VPython5 on Ubuntu but I've some doubt about the 
"configure" process.
I can't understand what is reported in the Install file:

"    There have been significant changes in where 3rd-party software is 
stored on
    Ubuntu 9.04. You probably want to use /usr/bin/python2.6 but store 
the Visual
    module in /usr/local/lib/python2.6/site-packages. To configure, do 
this in a
    folder parallel to vpython-core2:
   
    PYTHON=/usr/bin/python ../vpython-core2/configure 
--prefix=/usr/local/lib
   
    You will also need to copy vpython-core2/src/gtk2/site-packages.pth to
    /usr/lib/python2.6/dist-packages to put 
/usr/local/lib/python2.6/site-packages
    on the Python search path."


Thank you!

Matteo

Re: [Visualpython-users] Problems with exception handling in vpython on Linux

[Guenter S. <Gue...@ph...>]

See below.

Robert Xiao wrote:
> 
> 
> ---------- Forwarded message ----------
> From: *Robert Xiao* <nne...@gm... <mailto:nne...@gm...>>
> Date: 2009/8/31
> Subject: Re: [Visualpython-users] Problems with exception handling in 
> vpython on Linux
> To: Guenter Schneider <Gue...@ph... 
> <mailto:Gue...@ph...>>
> 
> 
> 2009/8/31 Guenter Schneider <Gue...@ph... 
> <mailto:Gue...@ph...>>
> 
>     I ran into a number of problems with vpython on Linux which appear to be
>     all related. The problems do not happen in Windows. My system is ubuntu
>     9.04, vpython 5.12 compiled from source (5.11 gives identical results).
> 
> 
> What version of the Boost libraries are you using?
boost 1.35 (libboost1.35-dev)
>  
> 
>     Thee common feature I see on Linux is, whenever vpython raises an
>     exception, python seg. faults.
> 
>     Example 1:
> 
>     In [1]: from visual import *
> 
>     In [2]: a = vector(1,2,3)
> 
>     In [3]: for i in a:
>        ...:     print i
>        ...:
>        ...:
>     1.0
>     2.0
>     3.0
>     Segmentation fault
>     ~ $
> 
>     but the following works:
> 
>     Example 2:
> 
>     In [1]: from visual import *
> 
>     In [2]: a = vector(1,2,3)
> 
>     In [3]: for i in a:
>        ...:     print i
>        ...:     if i>2:
>        ...:         break
>        ...:
>        ...:
>     1.0
>     2.0
>     3.0
> 
>     This seems to point to the raising a StopIteration exception as the
>     problem point.
> 
> 
>     Example 3:
>     In [1]: from visual import *
> 
>     In [2]: a = [1,2,3]
> 
>     In [3]: mag2(a)
>     Out[3]: 14.0
> 
>     In [4]: a = [1,2,'x']
> 
>     In [5]: mag2(a)
>     Segmentation fault
>     ~ $ 
> 
> 
>     It should have raised a TypeError as in this case
> 
> It's actually Boost.Python.ArgumentError, since [1,2,'x'] can't be 
> coerced to a vector, so it is passed in as a list.

I was guessing and did not try everything on Windows.

> 
>  >>> visual.mag2([1,2,'x'])
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> Boost.Python.ArgumentError: Python argument types in
>     visual.cvisual.mag2(list)
> did not match C++ signature:
>     mag2(class cvisual::vector)
>     mag2(class boost::python::numeric::array)
>  
> 
>     Finally this fails as well:
> 
>     Example 5:
>     In [1]: from visual import *
> 
>     In [2]: quit()
>     Do you really want to exit ([y]/n)?
>     Segmentation fault
>     ~ $
> 
> quit() is a Python built-in, and it isn't overridden by Visual. Does 
> quit() work if you don't import visual?

Yes.

> 
> Can you try these tests:
> vector(1,2,3)[4] # throws std::out_of_range
> vector('x')
> faces(pos=[1])
> faces(normal=[])
> 
> These all directly throw exceptions.
> 
All end in seg. faults on my system.

In [1]: from visual import *

In [2]: faces(normal=[])
Segmentation fault

I appreciate your help.

Guenter

> 
> 
> 2009/8/31 Bruce Sherwood <Bru...@nc... 
> <mailto:Bru...@nc...>>
> 
>     Moreover, your Example 1 is exceptionally strange, as it should not
>     give an
> 
>     error of any kind (nor does it give an error for me). Is it possible
>     that
>     there's a typo in your reporting of Example 1?
> 
> 
> StopIteration is raised by an iterator when it has no more objects to 
> iterate over. It is not an error, but it can be raised by an iterator.
> 
> Robert
> 
> 
> ------------------------------------------------------------------------
> 
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day 
> trial. Simplify your report design, integration and deployment - and focus on 
> what you do best, core application coding. Discover what's new with 
> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> Visualpython-users mailing list
> Vis...@li...
> https://lists.sourceforge.net/lists/listinfo/visualpython-users

-- 
-----------------------------------------------------
Guenter Schneider

Email:  Gue...@ph...
Phone:  541 737 1706
Fax:    541 737 1683

Oregon State University
Department of Physics
301 Weniger Hall
Corvallis, OR 97331-6507, USA
-----------------------------------------------------

Re: [Visualpython-users] Problems with exception handling in vpython on Linux

[Bruce S. <Bru...@nc...>]

I don't understand enough about building on Linux to be sure that it would help, 
but it might be worth building according to the instructions in INSTALL.txt, 
since that's how I've built Visual and it works. Moreover, the configure stage 
will tell you if you're missing certain dependencies. On the other hand, it 
seems possible that there's some incompatibility between Visual and 64bit Ubuntu 
(I only have access to 32bit Ubuntu).

You suspect that "whenever vpython raises an exception, python seg. faults", but 
in your Example 1 there's no reason why VPython would raise an exception.

Bruce Sherwood

Guenter Schneider wrote:
> Thank you for the prompt answers and I am glad it's my setup because 
> that should be easy to fix.
> 
> There is no typo in the examples. All is cut and paste out of ipython 
> sessions.
> 
> I should have mentioned I use 64bit Ubuntu.
> I use boost 1.35 (libboost1.35-dev) and python 2.6.2
> 
> I use this script to build and install vpython
> 
> #!/bin/bash
> 
> SOFTWARE=visual-5.12_release
> ARCHIVE=$SOFTWARE.tar.bz2
> ARCHIVEDIR="$SOFTWARE"
> BUILDDIR=$SOFTWARE-install
> tar jxvf $ARCHIVE
> mkdir -p $BUILDDIR
> cd $BUILDDIR
> aptitude -y install libboost1.35-dev
> aptitude -y install libsigc++-2.0-dev libgtkmm-2.4-dev libgtkglext1-dev 
> libgtkglext1 libgtkglextmm-x11-1.2-0 libgtkglextmm-x11-1.2-dev 
> libglademm-2.4-1c2a libglademm-2.4-dev
> ../$ARCHIVEDIR/configure --prefix /usr
> make
> 
> #as root
> cd $BUILDDIR
> make install
> echo /usr/lib/python2.6/site-packages >> 
> /usr/lib/python2.6/dist-packages/site-packages.pth
> 
> If necessary I will setup a clean system from scratch and install 
> vpython there, but I'd rather fix it without going this route.
> 
> Guenter Schneider
> 

Re: [Visualpython-users] Problems with exception handling in vpython on Linux

[Guenter S. <Gue...@ph...>]

Thank you for the prompt answers and I am glad it's my setup because 
that should be easy to fix.

There is no typo in the examples. All is cut and paste out of ipython 
sessions.

I should have mentioned I use 64bit Ubuntu.
I use boost 1.35 (libboost1.35-dev) and python 2.6.2

I use this script to build and install vpython

#!/bin/bash

SOFTWARE=visual-5.12_release
ARCHIVE=$SOFTWARE.tar.bz2
ARCHIVEDIR="$SOFTWARE"
BUILDDIR=$SOFTWARE-install
tar jxvf $ARCHIVE
mkdir -p $BUILDDIR
cd $BUILDDIR
aptitude -y install libboost1.35-dev
aptitude -y install libsigc++-2.0-dev libgtkmm-2.4-dev libgtkglext1-dev 
libgtkglext1 libgtkglextmm-x11-1.2-0 libgtkglextmm-x11-1.2-dev 
libglademm-2.4-1c2a libglademm-2.4-dev
../$ARCHIVEDIR/configure --prefix /usr
make

#as root
cd $BUILDDIR
make install
echo /usr/lib/python2.6/site-packages >> 
/usr/lib/python2.6/dist-packages/site-packages.pth

If necessary I will setup a clean system from scratch and install 
vpython there, but I'd rather fix it without going this route.

Guenter Schneider

Bruce Sherwood wrote:
> I too am running Ubuntu 9.04, Visual 5.12, and I cannot reproduce any of these 
> errors. I have no idea what could be wrong. What is the statement you used to 
> configure the make?
> 
> Moreover, your Example 1 is exceptionally strange, as it should not give an 
> error of any kind (nor does it give an error for me). Is it possible that 
> there's a typo in your reporting of Example 1?
> 
> Bruce Sherwood
> 
> Guenter Schneider wrote:
>> I ran into a number of problems with vpython on Linux which appear to be 
>> all related. The problems do not happen in Windows. My system is ubuntu 
>> 9.04, vpython 5.12 compiled from source (5.11 gives identical results).
>>
>> Thee common feature I see on Linux is, whenever vpython raises an 
>> exception, python seg. faults.
>>
>> Example 1:
>>
>> In [1]: from visual import *
>>
>> In [2]: a = vector(1,2,3)
>>
>> In [3]: for i in a:
>>     ...:     print i
>>     ...:
>>     ...:
>> 1.0
>> 2.0
>> 3.0
>> Segmentation fault
>> ~ $
>>
>> but the following works:
>>
>> Example 2:
>>
>> In [1]: from visual import *
>>
>> In [2]: a = vector(1,2,3)
>>
>> In [3]: for i in a:
>>     ...:     print i
>>     ...:     if i>2:
>>     ...:         break
>>     ...:
>>     ...:
>> 1.0
>> 2.0
>> 3.0
>>
>> This seems to point to the raising a StopIteration exception as the 
>> problem point.
>>
>> Example 3:
>> In [1]: from visual import *
>>
>> In [2]: a = [1,2,3]
>>
>> In [3]: mag2(a)
>> Out[3]: 14.0
>>
>> In [4]: a = [1,2,'x']
>>
>> In [5]: mag2(a)
>> Segmentation fault
>> ~ $
>>
>> It should have raised a TypeError as in this case
>>
>> In [1]: from visual import *
>>
>> In [2]: a = [1,2,'x']
>>
>> In [3]: print a[0]*a[0]+a[1]*a[1]+a[2]*a[2]
>> ------> print(a[0]*a[0]+a[1]*a[1]+a[2]*a[2])
>> ---------------------------------------------------------------------------
>> TypeError                                 Traceback (most recent call last)
>>
>> Finally this fails as well:
>>
>> Example 5:
>> In [1]: from visual import *
>>
>> In [2]: quit()
>> Do you really want to exit ([y]/n)?
>> Segmentation fault
>> ~ $
>>
>> This error  is probably caused by a SystemExit exception.
>>
>> Is something wrong with my install? Hard to see how to go wrong there, 
>> it's configure, make, make install and taking care of site-packages in 
>> ubuntu 9.04.
>>
>> Thank you for your help and the great work.
>>
>> Guenter Schneider
>>
>> ------------------------------------------------------------------------------
>> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day 
>> trial. Simplify your report design, integration and deployment - and focus on 
>> what you do best, core application coding. Discover what's new with 
>> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
>> _______________________________________________
>> Visualpython-users mailing list
>> Vis...@li...
>> https://lists.sourceforge.net/lists/listinfo/visualpython-users
> 
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day 
> trial. Simplify your report design, integration and deployment - and focus on 
> what you do best, core application coding. Discover what's new with 
> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
> _______________________________________________
> Visualpython-users mailing list
> Vis...@li...
> https://lists.sourceforge.net/lists/listinfo/visualpython-users

[Visualpython-users] Problems with exception handling in vpython on Linux

[Robert X. <nne...@gm...>]

---------- Forwarded message ----------
From: Robert Xiao <nne...@gm...>
Date: 2009/8/31
Subject: Re: [Visualpython-users] Problems with exception handling in
vpython on Linux
To: Guenter Schneider <Gue...@ph...>


2009/8/31 Guenter Schneider <Gue...@ph...>

> I ran into a number of problems with vpython on Linux which appear to be
> all related. The problems do not happen in Windows. My system is ubuntu
> 9.04, vpython 5.12 compiled from source (5.11 gives identical results).
>

What version of the Boost libraries are you using?


> Thee common feature I see on Linux is, whenever vpython raises an
> exception, python seg. faults.
>
> Example 1:
>
> In [1]: from visual import *
>
> In [2]: a = vector(1,2,3)
>
> In [3]: for i in a:
>    ...:     print i
>    ...:
>    ...:
> 1.0
> 2.0
> 3.0
> Segmentation fault
> ~ $
>
> but the following works:
>
> Example 2:
>
> In [1]: from visual import *
>
> In [2]: a = vector(1,2,3)
>
> In [3]: for i in a:
>    ...:     print i
>    ...:     if i>2:
>    ...:         break
>    ...:
>    ...:
> 1.0
> 2.0
> 3.0
>
> This seems to point to the raising a StopIteration exception as the
> problem point.
>

> Example 3:
> In [1]: from visual import *
>
> In [2]: a = [1,2,3]
>
> In [3]: mag2(a)
> Out[3]: 14.0
>
> In [4]: a = [1,2,'x']
>
> In [5]: mag2(a)
> Segmentation fault
> ~ $
>

> It should have raised a TypeError as in this case
>
It's actually Boost.Python.ArgumentError, since [1,2,'x'] can't be coerced
to a vector, so it is passed in as a list.

>>> visual.mag2([1,2,'x'])
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
Boost.Python.ArgumentError: Python argument types in
    visual.cvisual.mag2(list)
did not match C++ signature:
    mag2(class cvisual::vector)
    mag2(class boost::python::numeric::array)


> Finally this fails as well:
>
> Example 5:
> In [1]: from visual import *
>
> In [2]: quit()
> Do you really want to exit ([y]/n)?
> Segmentation fault
> ~ $
>
quit() is a Python built-in, and it isn't overridden by Visual. Does quit()
work if you don't import visual?

Can you try these tests:
vector(1,2,3)[4] # throws std::out_of_range
vector('x')
faces(pos=[1])
faces(normal=[])

These all directly throw exceptions.


2009/8/31 Bruce Sherwood <Bru...@nc...>

> Moreover, your Example 1 is exceptionally strange, as it should not give an
> error of any kind (nor does it give an error for me). Is it possible that
> there's a typo in your reporting of Example 1?
>

StopIteration is raised by an iterator when it has no more objects to
iterate over. It is not an error, but it can be raised by an iterator.

Robert

Re: [Visualpython-users] Problems with exception handling in vpython on Linux

[Bruce S. <Bru...@nc...>]

I too am running Ubuntu 9.04, Visual 5.12, and I cannot reproduce any of these 
errors. I have no idea what could be wrong. What is the statement you used to 
configure the make?

Moreover, your Example 1 is exceptionally strange, as it should not give an 
error of any kind (nor does it give an error for me). Is it possible that 
there's a typo in your reporting of Example 1?

Bruce Sherwood

Guenter Schneider wrote:
> I ran into a number of problems with vpython on Linux which appear to be 
> all related. The problems do not happen in Windows. My system is ubuntu 
> 9.04, vpython 5.12 compiled from source (5.11 gives identical results).
> 
> Thee common feature I see on Linux is, whenever vpython raises an 
> exception, python seg. faults.
> 
> Example 1:
> 
> In [1]: from visual import *
> 
> In [2]: a = vector(1,2,3)
> 
> In [3]: for i in a:
>     ...:     print i
>     ...:
>     ...:
> 1.0
> 2.0
> 3.0
> Segmentation fault
> ~ $
> 
> but the following works:
> 
> Example 2:
> 
> In [1]: from visual import *
> 
> In [2]: a = vector(1,2,3)
> 
> In [3]: for i in a:
>     ...:     print i
>     ...:     if i>2:
>     ...:         break
>     ...:
>     ...:
> 1.0
> 2.0
> 3.0
> 
> This seems to point to the raising a StopIteration exception as the 
> problem point.
> 
> Example 3:
> In [1]: from visual import *
> 
> In [2]: a = [1,2,3]
> 
> In [3]: mag2(a)
> Out[3]: 14.0
> 
> In [4]: a = [1,2,'x']
> 
> In [5]: mag2(a)
> Segmentation fault
> ~ $
> 
> It should have raised a TypeError as in this case
> 
> In [1]: from visual import *
> 
> In [2]: a = [1,2,'x']
> 
> In [3]: print a[0]*a[0]+a[1]*a[1]+a[2]*a[2]
> ------> print(a[0]*a[0]+a[1]*a[1]+a[2]*a[2])
> ---------------------------------------------------------------------------
> TypeError                                 Traceback (most recent call last)
> 
> Finally this fails as well:
> 
> Example 5:
> In [1]: from visual import *
> 
> In [2]: quit()
> Do you really want to exit ([y]/n)?
> Segmentation fault
> ~ $
> 
> This error  is probably caused by a SystemExit exception.
> 
> Is something wrong with my install? Hard to see how to go wrong there, 
> it's configure, make, make install and taking care of site-packages in 
> ubuntu 9.04.
> 
> Thank you for your help and the great work.
> 
> Guenter Schneider
> 
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