X-Received: by 10.66.233.137 with SMTP id tw9mr18824331pac.47.1452702827264; Wed, 13 Jan 2016 08:33:47 -0800 (PST)
X-Received: by 10.50.73.200 with SMTP id n8mr547214igv.6.1452702827232; Wed, 13 Jan 2016 08:33:47 -0800 (PST)
Path: csiph.com!usenet.blueworldhosting.com!feeder01.blueworldhosting.com!peer01.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!h5no3935750igh.0!news-out.google.com!kr2ni3929igb.0!nntp.google.com!h5no3935747igh.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail
Newsgroups: comp.lang.python
Date: Wed, 13 Jan 2016 08:33:46 -0800 (PST)
In-Reply-To: <dea9a4fb-29e4-47de-8a45-f744f6d71f05@googlegroups.com>
Complaints-To: groups-abuse@google.com
Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=117.195.56.114; posting-account=mBpa7woAAAAGLEWUUKpmbxm-Quu5D8ui
NNTP-Posting-Host: 117.195.56.114
References: <c0bb7499-c359-4010-aac2-270d1b82a47d@googlegroups.com> <34aa811c-433d-4f8a-90e0-9dd768460415@googlegroups.com> <5695e025$0$11113$c3e8da3@news.astraweb.com> <dea9a4fb-29e4-47de-8a45-f744f6d71f05@googlegroups.com>
User-Agent: G2/1.0
MIME-Version: 1.0
Message-ID: <4d4de4cb-90c4-4edb-a5ef-ed331f8cfccf@googlegroups.com>
Subject: Re: When I need classes?
From: Rustom Mody <rustompmody@gmail.com>
Injection-Date: Wed, 13 Jan 2016 16:33:47 +0000
Content-Type: text/plain; charset=ISO-8859-1
X-Received-Bytes: 3420
X-Received-Body-CRC: 1283340455
Xref: csiph.com comp.lang.python:101629

Guess you (Rodrigo) wanted to send this to the list?

On Wed, Jan 13, 2016 at 8:22 PM, Rodrigo Bistolfi  wrote:

>     Start by using just functions. As you move forward, you will find that 
> often you are passing the same data structure as first argument to some 
> functions. At that point, you are already using OOP, and you may want to
> formalize that in a class.

>    HTH




On Wednesday, January 13, 2016 at 12:01:29 PM UTC+5:30, Rustom Mody wrote:
> On Wednesday, January 13, 2016 at 10:57:23 AM UTC+5:30, Steven D'Aprano wrote:
> > On Wednesday 13 January 2016 14:36, Rustom Mody wrote:
> > 
> > > 1. Python the LANGUAGE, is rather even-handed in paradigm choice: Choose
> > > OO, imperative, functional or whatever style pleases/suits you
> > > 2. Python LIBRARIES however need to make committing choices.  Users of
> > > those then need to align with these.
> > 
> > I don't think that second one is necessarily correct. Look at the random 
> > module: it is based on an OOP design, with classes random.Random and 
> > random.SystemRandom doing the real work. But most people don't use them 
> > directly, they use the procedural interface random.random, random.choice, 
> > random.seed etc.
> > 
> 
> Yes one can have more or less degrees of freedom. Are infinite degrees possible?
> I believe not.
> 
> eg My example of re is strictly not correct: can use strings instead of re objects
> Can use findall instead of search/match and avoid groping around in opaque match
> objects
> So you may conclude that the re module allows these degrees of freedom
> But you cant bold res all the way into the syntax of the language (eg perl/awk)
> 
> Anyway these are side points
> My main point is that when you sit on top of heavy-duty many-layered libraries
> (worse frameworks... OP seems to be trying Kivy) then you have to align with
> the opinionatedness of all the layers down to python.
> 
> Of course that is modulo the leakiness of the abstractions.
> eg mostly python programmers do not need to know the underlying C...
> 
> Mostly...
> And then someone asks about id/is/performance...