Re: [Visualpython-users] VPython for Python 2.1 on Windows

[Dethe E. <de...@al...>]

That's great!  Any ETA for the Mac version?

--Dethe

on 01/6/20 02:55 PM, Bruce Sherwood at ba...@an... wrote:

> At http://cil.andrew.cmu.edu/projects/visual you can now download VPython
> for Python 2.1 on Windows.
> 
> Paul Dubois and Dave Scherer diagnosed the problem we were having with
> Python 2.1, and David Andersen recompiled. Thanks, guys.
> 
> The new package no longer overwrites the standard IDLE but creates another
> folder Tools/idle_VPython and shortcuts on the desktop and the start menu
> that point to it. Users also have access to the standard IDLE from the
> start menu.
> 
> There is a new demo program, doublependulum.py, which shows chaotic motion
> in a simple system.
> 
> The minor source changes to Visual have not yet been checked in to
> sourceforge. They consist essentially of replacing tests such as "a ==
> None" with "a is None". Python 2.1 introduced "rich comparisons" to satisfy
> users of Numeric who wanted to do more than test whether one array was
> equal to another. They wanted instead to be able to get an array of true
> and false results for element-by-element comparisons. They also wanted to
> be able to do other comparisons (<, >, etc.). This had a side effect which
> made "a == None" illegal if a is a Numeric array
> 
> Bruce Sherwood
> 
> 
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> 

-- 

Dethe Elza 
Chief Mad Scientist
Burning Tiger Technologies