While loop help

[Walter Hurry]

On Tue, 09 Apr 2013 16:12:34 -0400, Dave Angel wrote:

> On 04/09/2013 03:35 PM, Walter Hurry wrote:
>> On Wed, 10 Apr 2013 02:10:29 +1000, Chris Angelico wrote:
>>
>>> On Wed, Apr 10, 2013 at 1:47 AM,  <thomasancilleri at gmail.com> wrote:
>>>> ... I'm not sure what version I'm using ...
>>>
>>> Try putting these lines into a Python script:
>>>
>>> import sys print(sys.version)
>>>
>> That works (of course), but in every Python version I've seen, one
>> merely needs to invoke the python interactive interpreter and the
>> banner is displayed:
>>
>> $ python Python 2.7.3 (default, Aug  9 2012, 17:23:57)
>> [GCC 4.7.1 20120720 (Red Hat 4.7.1-5)] on linux2 Type "help",
>> "copyright", "credits" or "license" for more information.
>>>>> quit()
>> $
>>
>>
> And if several are installed, that isn't necessarily the one that'll run
> when one runs a script.  Depends on how the script is invoked (and on
> what OS is running), and on the shebang line, PATH, etc.
> 
> The real point about those two lines is that they can be added to most
> scripts.

Well yes, but if multiple versions are installed and the script has a 
shebang, then invoking the same interpreter as the shebang does will 
produce the same result.

But this is dancing on the head of a pin anyway; OP just didn't know what 
version of Python he was running, so he is extremely unlikely to have 
more than one version installed, and to be choosing amongst them.