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From: Terry Reedy <tjreedy@udel.edu>
Subject: Re: python 2.5 and ast
Date: Mon, 28 Nov 2011 15:08:23 -0500
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Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:16348

On 11/28/2011 6:45 AM, Andrea Crotti wrote:
> I'm happily using the ast module to analyze some code,
> but my scripts need also to run unfortunately on python 2.5
>
> The _ast was there already, but the ast helpers not yet.
> Is it ok if I just copy over the source from the ast helpers in my code
> base

That is the standard way of backporting features of later versions.

-- 
Terry Jan Reedy