how to go back from 2.6.4 to 2.6.2 under windows ?

[Terry Reedy]

On 12/20/2009 2:59 PM, Stef Mientki wrote:
> Benjamin Kaplan wrote:
>> On Sun, Dec 20, 2009 at 9:26 AM, Stef Mientki <stef.mientki at gmail.com>
>> wrote:
>>> hello,
>>>
>>> I've just upgraded my system from Python 2.5 to 2.6.4,
>>> and installed the latest packages of a lot of libraries.
>>>
>>> Now one essential package (VPython) only works with Python 2.6.2.
>>> I tried to install Python 2.6.2 over this 2.6.4 installation,
>>> and indeed the readme file says it's 2.6.2,
>>> but the python and pythonw are still 2.6.4.
>>> Why is that so ??
>>>
>>> Now assume that a number of packages (because compiled with 2.6.4)
>>> will not
>>> work correctly with 2.6.2.
>>> Is that correct ?
>>>
>>
>> 2.6.4 is just a bugfix release- it's binary compatible with the other
>> 2.6 releases. So any package that worked under 2.6.2 shouid also work
>> under 2.6.4 unless a new bug was introduced or it relied on a bug that
>> was fixed. And any package that works under 2.6.4 will also work under
>> 2.6.2 without recompiling unless it hits one of the bugs that was
>> fixed.
> thanks Benjamin,
>
> Then VPython must hit one of the bugs that were fixed.
> On a second machine,
> - I removed Python 2.6.4 (without removing all other libraries)
> - installed Python 2.6.2 (without reïnstalling all the libraries)
> and indeed the VPython library works as expected.
>
> So I guess this is a reasonable approach,
> and all libraries should work well,
> unless one of these libraries has a work around for one of the bugs
> fixed between 2.6.2 and 2.6.4.

Let VPython people know about this problem. People should be able to run 
it on the latest patched 2.6.