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Date: Fri, 14 Sep 2018 10:02:18 +0200 (CEST)
From: Wojciech Puchar <wojtek@puchar.net>
To: Robert Huff <roberthuff@rcn.com>
cc: Ports FreeBSD <freebsd-ports@freebsd.org>
Subject: Re: how to enforce one version of python
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>>  part is the combination of 2-only holdouts and new 3-only code,
>>  which is why it's easy to end up with both installed.
>
> 	_This_ is really annoying.  I try to keep my systems with exactly
> what they need installed, to reduce both bloat and possibly security
> issues.  There's one Perl installation; having two Python versions -
> and trying to keep track between them - makes me use a lot of bad
> language.
>
>
Just another variation of DLL hell. Welcome to modern software environment 
;)