Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!xlned.com!feeder5.xlned.com!newsfeed.xs4all.nl!newsfeed4.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!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 0.001 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'python.': 0.02; 'python,': 0.02; 'widely': 0.05; 'c++,': 0.07; 'class,': 0.07; 'alter': 0.09; 'received:67.192': 0.09; 'received:67.192.241': 0.09; 'received:dfw.emailsrvr.com': 0.09; 'used.': 0.09; 'python': 0.11; 'declaration': 0.16; 'effect.': 0.16; 'rarely': 0.16; 'underscores': 0.16; 'java,': 0.16; 'language': 0.16; 'wrote:': 0.18; 'looked': 0.18; 'variable': 0.18; 'examples': 0.20; 'header :User-Agent:1': 0.23; 'module,': 0.24; 'questions:': 0.24; 'received:emailsrvr.com': 0.24; 'received:(smtp server)': 0.26; 'values': 0.27; 'header:In-Reply-To:1': 0.27; 'am,': 0.29; 'code': 0.31; 'gary': 0.31; 'class': 0.32; 'text': 0.33; 'programmers': 0.33; 'used,': 0.33; 'but': 0.35; 'there': 0.35; 'c++': 0.36; 'object,': 0.36; 'thanks': 0.36; 'subject:?': 0.36; 'two': 0.37; 'easily': 0.37; 'to:addr:python-list': 0.38; 'fact': 0.38; 'to:addr:python.org': 0.39; 'how': 0.40; 'read': 0.60; 'new': 0.61; 'world.': 0.61; 'email addr:gmail.com': 0.63; 'name': 0.63; 'kind': 0.63; 'within': 0.65; 'confusing': 0.84; 'subject:skip:E 10': 0.95 X-Virus-Scanned: OK Date: Sat, 17 Aug 2013 13:16:32 -0700 From: Gary Herron User-Agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130803 Thunderbird/17.0.8 MIME-Version: 1.0 To: python-list@python.org Subject: Re: Encapsulation unpythonic? References: <8255dfbd-a2a1-4ab7-b900-ee19faa459f2@googlegroups.com> In-Reply-To: <8255dfbd-a2a1-4ab7-b900-ee19faa459f2@googlegroups.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 Precedence: list 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: 27 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1376771203 news.xs4all.nl 15976 [2001:888:2000:d::a6]:48634 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:52640 On 08/17/2013 05:26 AM, fsaldan1@gmail.com wrote: > I am new to Python, with experience in Java, C++ and R. > > As I understand encapsulation is not a big thing in the Python world. I read that you can put two underscores before the name of a variable within a class declaration but in the many examples of code I looked at this is not widely used. I also read that encapsulation is "unpythonic." > > Questions: > > 1) Is there a good text where I can read about the language philosophy? What practices are "pythonic" or "unpythonic"? > > 2) If it is in fact true that encapsulation is rarely used, how do I deal with the fact that other programmers can easily alter the values of members of my classes? > > Thanks for any insights. > > FS You are confusing encapsulation with data hiding! Encapsulation is very much a part of Python. Every class, module, indeed every object, encapsulates some kind of behavior. However, *hiding* the members of a class is not considered Pythonic. There is no private/public as in C++, however, there are way to achieve that effect. Gary Herron