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Date: Thu, 20 Mar 2014 10:45:33 -0700
From: Gary Herron <gary.herron@islandtraining.com>
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Subject: Re: running python 2 vs 3
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On 03/20/2014 10:10 AM, notbob wrote:
> On 2014-03-20, Zachary Ware <zachary.ware+pylist@gmail.com> wrote:
>
>> If you're specifying the interpreter in your command (by calling
>> "python <scriptname>.py", etc), the shebang won't mean anything
>> anyway.
> DOH!
>
> I was following you, fine, until that last sentence.  Then how should
> I invoke the scripts? ....as your example is exactly how I've been
> doing it with 2.7, as per Learn Python the Hard Way.  Simply
> ./<scriptname>.py from the appropriate directory (assuming I keep both
> vers in separate dirs)?
>
> nb

If you mark your script as executable (chmod ...) and include the 
shebang line, and place it in a directory included in your search path 
(mine is ~/bin),  then you run it as you run any installed program:  
Just type it's name followed by any command line args.   I usually 
remove the .py portion of the name as I copy it into my bin directory so 
it really does look like any other installed program.

If you need to be in a specific directory when you run it, then perhaps 
you should consider a bit of a rewrite to remove this constraint.

Gary Herron