Path: csiph.com!goblin2!goblin.stu.neva.ru!newsfeed.xs4all.nl!newsfeed7.news.xs4all.nl!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
Return-Path: <lac@openend.se>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.001
X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'subject:Python': 0.05; 'tries': 0.05; 'pypy': 0.07; 'cc:addr:python-list': 0.09; 'os.name': 0.09; 'received:openend.se': 0.09; 'received:theraft.openend.se': 0.09; 'stackless': 0.09; 'subject:using': 0.09; 'def': 0.13; 'cc:addr:lac': 0.16; 'cc:addr:openend.se': 0.16; 'from:addr:lac': 0.16; 'from:addr:openend.se': 0.16; 'from:name:laura creighton': 0.16; 'ironpython': 0.16; 'message-id:@fido.openend.se': 0.16; 'received:89.233': 0.16; 'received:89.233.217': 0.16; 'received:89.233.217.133': 0.16; 'received:fido': 0.16; 'received:fido.openend.se': 0.16; 'threw': 0.16; 'to:addr:pearwood.info': 0.16; "to:name:steven d'aprano": 0.16; 'laura': 0.18; 'windows': 0.20; '2015': 0.20; 'cc:addr:python.org': 0.20; 'aug': 0.20; 'cc:2**1': 0.22; 'subject:skip:i 10': 0.22; 'sat,': 0.23; 'import': 0.24; 'header :In-Reply-To:1': 0.24; "i've": 0.25; 'received:se': 0.29; 'cc:no real name:2**1': 0.29; 'solutions.': 0.30; 'skip:s 30': 0.31; 'problem': 0.33; 'usually': 0.33; 'gives': 0.35; 'replaced': 0.35; 'skip:p 30': 0.35; 'sometimes': 0.35; 'but': 0.36; 'there': 0.36; 'cases': 0.36; 'subject:?': 0.36; 'subject:: ': 0.37; 'charset:us- ascii': 0.37; 'stuff': 0.38; 'well.': 0.40; 'where': 0.40; 'still': 0.40; 'header:Message-Id:1': 0.61; 'customer': 0.62; 'real': 0.62; 'our': 0.64; 'you.': 0.64; 'here': 0.66; 'received:89': 0.80; '+1000,': 0.84; '>how': 0.84; 'detecting': 0.84; 'macs,': 0.84; 'moot': 0.84; 'played': 0.91
To: "Steven D'Aprano" <steve@pearwood.info>
cc: python-list@python.org, lac@openend.se
From: Laura Creighton <lac@openend.se>
Subject: Re: Which Python implementation am I using?
In-Reply-To: Message from "Steven D'Aprano" <steve@pearwood.info> of "Sat, 08 Aug 2015 03:27:04 +1000." <55c4ea68$0$1667$c3e8da3$5496439d@news.astraweb.com>
References: <55c4ea68$0$1667$c3e8da3$5496439d@news.astraweb.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-ID: <9764.1438988599.1@fido>
Date: Sat, 08 Aug 2015 01:03:19 +0200
X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.3.9 (theraft.openend.se [89.233.217.130]); Sat, 08 Aug 2015 01:03:27 +0200 (CEST)
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.20+
Precedence: list
List-Id: General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe: <https://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive: <http://mail.python.org/pipermail/python-list/>
List-Post: <mailto:python-list@python.org>
List-Help: <mailto:python-list-request@python.org?subject=help>
List-Subscribe: <https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups: comp.lang.python
Message-ID: <mailman.1316.1438988626.3674.python-list@python.org>
Lines: 30
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1438988626 news.xs4all.nl 2894 [2001:888:2000:d::a6]:52800
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:95144

In a message of Sat, 08 Aug 2015 03:27:04 +1000, "Steven D'Aprano" writes:
>
>    def jython():
>        t = platform.java_ver()
>        return (t and t[0]) or ('java' in sys.platform.lower())

Around here if we cannot find platform.python_implemention()
we just look for sys.platform.startswith('java')

Are there any cases where you need platform.java_ver() ?

I don't know about IronPython

>How about PyPy, Stackless, or others?

PyPy has platform.python_implementation these days as well.  If you
cannot find it, look for '__pypy__' in sys.builtin_module_names

For detecting Stackless my PYTHONSTARTUP just tries to import stackless.

Detecting Cygwin may be important for you.  It's a real mess.
platform.system usually gives you stuff like: CYGWIN_NT-5.1
but, alas, sometimes it just gives you 'Windows'.
os.name sometimes gives you 'nt' -- but sometimes it gives you 'posix'.

I've played whack-a-mole with this one for a while, and still don't
like any of our solutions.  And the customer threw out his windows
systems and replaced them with Macs, so the problem now is moot for me.

Laura