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Re: Python is going to be hard

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On 09/03/2014 08:22 PM, Rustom Mody wrote:
> 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

Lots of Python functions have side effects.

> | -- Variables are immutable, preventing unexpected changes to program data by other code

Lots of Python core data types are mutable.

> | -- Data can be freely aliased or copied without introducing unintended effects from mutation

Every mutable Python data type that is aliased can be affected by unintended mutational effects -- as well as 
intentional ones.

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

Ridiculous argument after ridiculous argument.  Please do not waste our time with nonsense.

--
~Ethan~

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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

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