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To: python-list@python.org
From: Terry Reedy <tjreedy@udel.edu>
Subject: Re: HMM and CRF Package
Date: Wed, 25 Jul 2012 15:58:50 -0400
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Xref: csiph.com comp.lang.python:26050

On 7/25/2012 11:58 AM, subhabangalore@gmail.com wrote:
 > As most of the libraries give so many bindings and conditions best way
is to make it. Not very tough, I made earlier, but as some files were
lost so was thinking instead of a remake if ready versions work.  Or may
look change from Python 3 to previous version so when 3 will be
supported solution. But can I install both Python 3 and Python2.x or
call 2.x from 3.x?

You can have multiple versions of Python installed. Just be careful on 
*nix to use altinstall so as to not disturb the system install used by 
the system.

Pythonx.y can only use code that works with x.y ;=). However, any Python 
process can use any other program via the subprocess module. You just 
have to work out the data transfer.

-- 
Terry Jan Reedy