Re: Python 3 virtualenvs

From	Carl Meyer <carl@oddbird.net>
Newsgroups	comp.lang.python
Subject	Re: Python 3 virtualenvs
Date	2015-11-30 10:28 -0700
Message-ID	<mailman.43.1448904539.14615.python-list@python.org> (permalink)
References	(5 earlier) <mailman.7.1448800035.14615.python-list@python.org> <slrnn5lv6n.1t1.jon+usenet@frosty.unequivocal.co.uk> <201511291412.tATECKN8006265@fido.openend.se> <565C7A1B.2070202@oddbird.net> <201511301720.tAUHKlAe017071@fido.openend.se>

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On 11/30/2015 10:20 AM, Laura Creighton wrote:
> In a message of Mon, 30 Nov 2015 09:32:27 -0700, Carl Meyer writes:
>>> I think it is only meant to be used by people who want to install
>>> packages but not site-wide, but I am not sure about that.
>>
>> I don't know what you mean by this either. Isn't the ability to "install
>> packages but not site-wide" precisely what virtualenv (and venv) give you?
> 
> I rarely use it for that.  What I nearly always want is different
> python interpreters.  CPython, PyPy, Jython for anything from 2.6 to
> 3.6.

If you just want the variety of interpreters, virtualenv doesn't give
you that -- you have to already have a given interpreter installed
system-wide for virtualenv to be able to use it. What virtualenv gives
you is isolated environments for package installations (which can use
any interpreter you have installed).

Venv does the same (and won't have any trouble with PyPy or Jython
either, once they reach Python 3.3 compatibility).

So I agree that for now you should be sticking with virtualenv (I use it
too), but I hope you'll take another look at venv a few years down the
road, if you find yourself in a situation where all the interpreters you
need are 3.3+.

(Or maybe virtualenv will make the transition sooner, and you'll start
using venv under the hood for 3.3+ without even realizing it.)

Carl

Thread

Python 3 virtualenvs real-not-anti-spam-address@apple-juice.co.uk (D.M. Procida) - 2015-11-28 00:37 +0000
  Re: Python 3 virtualenvs Laura Creighton <lac@openend.se> - 2015-11-28 02:09 +0100
    Re: Python 3 virtualenvs real-not-anti-spam-address@apple-juice.co.uk (D.M. Procida) - 2015-11-28 01:35 +0000
  Faviourite improvements in Python 3.5 (was: Python 3 virtualenvs) Ben Finney <ben+python@benfinney.id.au> - 2015-11-28 12:42 +1100
  Re: Faviourite improvements in Python 3.5 (was: Python 3 virtualenvs) Laura Creighton <lac@openend.se> - 2015-11-28 03:23 +0100
  Re: Faviourite improvements in Python 3.5 (was: Python 3 virtualenvs) INADA Naoki <songofacandy@gmail.com> - 2015-11-28 16:17 +0900
  Re: Python 3 virtualenvs Jon Ribbens <jon+usenet@unequivocal.co.uk> - 2015-11-28 13:29 +0000
    Re: Python 3 virtualenvs real-not-anti-spam-address@apple-juice.co.uk (D.M. Procida) - 2015-11-28 19:37 +0000
      Re: Python 3 virtualenvs Jon Ribbens <jon+usenet@unequivocal.co.uk> - 2015-11-28 21:48 +0000
        Re: Python 3 virtualenvs Lele Gaifax <lele@metapensiero.it> - 2015-11-29 13:19 +0100
        Re: Python 3 virtualenvs Laura Creighton <lac@openend.se> - 2015-11-29 13:27 +0100
          Re: Python 3 virtualenvs Jon Ribbens <jon+usenet@unequivocal.co.uk> - 2015-11-29 13:23 +0000
            Re: Python 3 virtualenvs Laura Creighton <lac@openend.se> - 2015-11-29 15:12 +0100
            Re: Python 3 virtualenvs Carl Meyer <carl@oddbird.net> - 2015-11-30 09:32 -0700
            Re: Python 3 virtualenvs Laura Creighton <lac@openend.se> - 2015-11-30 18:20 +0100
            Re: Python 3 virtualenvs Carl Meyer <carl@oddbird.net> - 2015-11-30 10:28 -0700
              Re: Python 3 virtualenvs Jon Ribbens <jon+usenet@unequivocal.co.uk> - 2015-11-30 17:30 +0000
            Re: Python 3 virtualenvs Laura Creighton <lac@openend.se> - 2015-11-30 18:46 +0100

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