Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #77526

Re: Python is going to be hard

X-Received by 10.236.36.99 with SMTP id v63mr1058140yha.2.1409800968578; Wed, 03 Sep 2014 20:22:48 -0700 (PDT)
X-Received by 10.50.115.74 with SMTP id jm10mr29935igb.12.1409800968296; Wed, 03 Sep 2014 20:22:48 -0700 (PDT)
Path csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!news.glorb.com!dc16no997507qab.1!news-out.google.com!aw9ni2087igc.0!nntp.google.com!r2no13958833igi.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail
Newsgroups comp.lang.python
Date Wed, 3 Sep 2014 20:22:47 -0700 (PDT)
In-Reply-To <mailman.13751.1409795794.18130.python-list@python.org>
Complaints-To groups-abuse@google.com
Injection-Info glegroupsg2000goo.googlegroups.com; posting-host=59.95.22.7; posting-account=mBpa7woAAAAGLEWUUKpmbxm-Quu5D8ui
NNTP-Posting-Host 59.95.22.7
References <d9me0ap5s0s28qaeobbh6680gciel6c1og@4ax.com> <51acfec6-6b7b-4773-8d70-0360381bbed1@googlegroups.com> <mailman.13751.1409795794.18130.python-list@python.org>
User-Agent G2/1.0
MIME-Version 1.0
Message-ID <d80e4c36-74e8-4850-8ad1-e357e895abcc@googlegroups.com> (permalink)
Subject Re: Python is going to be hard
From Rustom Mody <rustompmody@gmail.com>
Injection-Date Thu, 04 Sep 2014 03:22:48 +0000
Content-Type text/plain; charset=ISO-8859-1
Xref csiph.com comp.lang.python:77526

Show key headers only | View raw

On Thursday, September 4, 2014 7:26:56 AM UTC+5:30, Chris Angelico wrote:
> On Thu, Sep 4, 2014 at 11:48 AM, Rustom Mody  wrote:
> >>>> NO PRINT

> Yes, or the OP could work with actual saved .py files and the
> reliability that comes from predictable execution environments... and
> use print. Why are you so dead against print?

Here is the most recent (2013) ACM/IEEE CS curriculum:
www.acm.org/education/CS2013-final-report.pdf

It is divided into tiers with core-tier1 being the bare minimum that
all CS graduate need to know.

One of (the many!) things there is this (pg 158)

| Functional Programming (3 Core-Tier1 hours)

| Effect-free programming
| -- Function calls have no side effects, facilitating compositional reasoning
| -- Variables are immutable, preventing unexpected changes to program data by other code
| -- Data can be freely aliased or copied without introducing unintended effects from mutation

So to answer your question: print statements are side-effecting and therefore obstruct
compositional reasoning.

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Python is going to be hard Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-09-03 14:10 -0400
  Re: Python is going to be hard John Gordon <gordon@panix.com> - 2014-09-03 18:17 +0000
    Re: Python is going to be hard Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-09-03 14:52 -0400
      Re: Python is going to be hard mm0fmf <none@mailinator.com> - 2014-09-03 22:37 +0100
  Re: Python is going to be hard Rock Neurotiko <miguelglafuente@gmail.com> - 2014-09-03 20:16 +0200
  Re: Python is going to be hard Rob Gaddi <rgaddi@technologyhighland.invalid> - 2014-09-03 11:19 -0700
    Re: Python is going to be hard Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-09-03 14:50 -0400
  Re: Python is going to be hard MRAB <python@mrabarnett.plus.com> - 2014-09-03 19:24 +0100
  Re: Python is going to be hard Skip Montanaro <skip@pobox.com> - 2014-09-03 13:28 -0500
    Re: Python is going to be hard Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-09-03 14:52 -0400
  Re: Python is going to be hard Ethan Furman <ethan@stoneleaf.us> - 2014-09-03 11:33 -0700
    Re: Python is going to be hard Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-09-03 14:41 -0400
      Re: Python is going to be hard Ethan Furman <ethan@stoneleaf.us> - 2014-09-03 12:49 -0700
  Re: Python is going to be hard Juan Christian <juan0christian@gmail.com> - 2014-09-03 15:44 -0300
    Re: Python is going to be hard Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-09-03 14:56 -0400
  Re: Python is going to be hard Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-09-03 14:49 -0400
    Re: Python is going to be hard Ethan Furman <ethan@stoneleaf.us> - 2014-09-03 11:55 -0700
      Re: Python is going to be hard Rob Gaddi <rgaddi@technologyhighland.invalid> - 2014-09-03 12:01 -0700
    Re: Python is going to be hard Ian Kelly <ian.g.kelly@gmail.com> - 2014-09-03 13:11 -0600
      Re: Python is going to be hard Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-09-03 15:22 -0400
    Re: Python is going to be hard Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-09-04 12:11 +1000
  Re: Python is going to be hard Denis McMahon <denismfmcmahon@gmail.com> - 2014-09-03 20:55 +0000
  Re: Python is going to be hard Rustom Mody <rustompmody@gmail.com> - 2014-09-03 18:48 -0700
    Re: Python is going to be hard Chris Angelico <rosuav@gmail.com> - 2014-09-04 11:56 +1000
      Re: Python is going to be hard Rustom Mody <rustompmody@gmail.com> - 2014-09-03 19:10 -0700
        Re: Python is going to be hard Chris Angelico <rosuav@gmail.com> - 2014-09-04 12:25 +1000
          Re: Python is going to be hard Rustom Mody <rustompmody@gmail.com> - 2014-09-03 19:33 -0700
            Re: Python is going to be hard alister <alister.nospam.ware@ntlworld.com> - 2014-09-04 10:29 +0000
              Re: Python is going to be hard Rustom Mody <rustompmody@gmail.com> - 2014-09-04 06:08 -0700
          Re: Python is going to be hard Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-09-04 23:25 +1000
            Re: Python is going to be hard Chris Angelico <rosuav@gmail.com> - 2014-09-04 23:55 +1000
      Re: Python is going to be hard Rustom Mody <rustompmody@gmail.com> - 2014-09-03 20:22 -0700
        Re: Python is going to be hard Chris Angelico <rosuav@gmail.com> - 2014-09-04 13:49 +1000
          Re: Python is going to be hard Rustom Mody <rustompmody@gmail.com> - 2014-09-03 21:11 -0700
            Re: Python is going to be hard Chris Angelico <rosuav@gmail.com> - 2014-09-04 15:02 +1000
              Re: Python is going to be hard Rustom Mody <rustompmody@gmail.com> - 2014-09-03 23:23 -0700
                Re: Python is going to be hard Chris Angelico <rosuav@gmail.com> - 2014-09-04 16:39 +1000
                Re: Python is going to be hard Rustom Mody <rustompmody@gmail.com> - 2014-09-04 06:15 -0700
                Re: Python is going to be hard Chris Angelico <rosuav@gmail.com> - 2014-09-04 23:30 +1000
                Re: Python is going to be hard Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-09-04 23:37 +1000
                Re: Python is going to be hard Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-09-04 15:04 +0100
                Re: Python is going to be hard Chris Angelico <rosuav@gmail.com> - 2014-09-05 00:08 +1000
                Re: Python is going to be hard Rustom Mody <rustompmody@gmail.com> - 2014-09-04 19:24 -0700
                Re: Python is going to be hard Chris Angelico <rosuav@gmail.com> - 2014-09-05 12:30 +1000
                Re: Python is going to be hard Roy Smith <roy@panix.com> - 2014-09-04 22:51 -0400
                Re: Python is going to be hard Rustom Mody <rustompmody@gmail.com> - 2014-09-04 19:56 -0700
                Re: Python is going to be hard Chris Angelico <rosuav@gmail.com> - 2014-09-05 13:08 +1000
        Re: Python is going to be hard Ethan Furman <ethan@stoneleaf.us> - 2014-09-03 21:06 -0700
          Re: Python is going to be hard Rustom Mody <rustompmody@gmail.com> - 2014-09-03 21:15 -0700

csiph-web