Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!news.mixmin.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed1a.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.005 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'pycon': 0.01; 'url:launchpad': 0.05; 'subject:Python': 0.06; 'defaults': 0.07; 'typed': 0.09; 'url:github': 0.09; 'url:blog': 0.10; 'python': 0.11; '"object': 0.16; '(now': 0.16; 'defaults,': 0.16; 'ironpython': 0.16; 'metaclasses': 0.16; 'peak': 0.16; 'properties,': 0.16; 'subject:Object': 0.16; 'url:bazaar': 0.16; 'url:enthought': 0.16; 'wrote:': 0.18; 'mike': 0.22; 'header:User- Agent:1': 0.23; '2005': 0.26; 'header:In-Reply-To:1': 0.27; 'feature': 0.29; 'array': 0.29; 'properties': 0.29; 'url:code': 0.29; 'implicit': 0.31; 'loading': 0.31; 'anyone': 0.31; 'there.': 0.32; 'are:': 0.33; 'created': 0.35; 'largely': 0.36; 'two': 0.37; 'expected': 0.38; 'skip:o 20': 0.38; 'tasks': 0.38; 'to:addr :python-list': 0.38; 'pm,': 0.38; 'skip:_ 40': 0.38; 'support,': 0.39; 'to:addr:python.org': 0.39; "you'll": 0.62; 'email addr:gmail.com': 0.63; 'show': 0.63; 'skip:n 10': 0.64; 'more': 0.64; 'charset:windows-1252': 0.65; 'header:Reply-To:1': 0.67; 'reply-to:no real name:2**0': 0.71; 'received:192.168.15': 0.84; 'received:98.158': 0.84; 'dozen': 0.91; 'subject:Systems': 0.91 Date: Mon, 11 Aug 2014 18:56:11 -0400 From: "Mike C. Fletcher" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.0 MIME-Version: 1.0 To: python-list@python.org Subject: Re: Python Object Systems References: <2d41828e-19ac-4e46-a487-8700c22d9b92@googlegroups.com> In-Reply-To: <2d41828e-19ac-4e46-a487-8700c22d9b92@googlegroups.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 Precedence: list Reply-To: mcfletch@vrplumber.com List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 41 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1407798306 news.xs4all.nl 2829 [2001:888:2000:d::a6]:45307 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:76086 On 14-08-11 04:26 PM, thequietcenter@gmail.com wrote: ... > Hello, has anyone created a survey of Python Object Systems? The two I am aware of are: > > - elk https://github.com/frasertweedale/elk > - Traits http://code.enthought.com/projects/traits/ Here's the ones from my talk at Pycon 2005 (http://www.vrplumber.com/programming/descriptors-pycon2005.pdf): OpenGLContext/PyVRML97 http://bazaar.launchpad.net/~mcfletch/pyvrml97/trunk/files Observable, auto-coercing data properties w/ Numeric/numpy array support, defaults BasicProperty (now largely abandoned): http://bazaar.launchpad.net/~mcfletch/basicproperty/trunk/files Again, observable auto-coercing typed properties, defaults, introspection Zope2 FieldProperty, DublinCore, Validation, Observability PEAK Defaults, delegation, implicit feature loading Traits Delegation, typing, validation, defaults, Observability, introspection PyObjc, ctypes, JythonC, IronPython Function-like things with lots of metadata There's also a listing of the other tasks for which descriptors/object systems were expected to show up at the time, if you look for Python + that key-word you'll likely find a few dozen more "object systems" out there. You'll also likely find about a thousand metaclasses these days. HTH, Mike -- ________________________________________________ Mike C. Fletcher Designer, VR Plumber, Coder http://www.vrplumber.com http://blog.vrplumber.com