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Re: Procedures and functions [was Re: Why not allow empty code blocks?]

From Chris Angelico <rosuav@gmail.com>
Newsgroups comp.lang.python
Subject Re: Procedures and functions [was Re: Why not allow empty code blocks?]
Date 2016-07-31 14:05 +1000
Message-ID <mailman.66.1469937961.6033.python-list@python.org> (permalink)
References (16 earlier) <e053i3F9kf6U1@mid.individual.net> <CAPTjJmo1fkFQdMUWo6yEc9MaLZMvZqpso+0QXw24-xEEm7erdg@mail.gmail.com> <mailman.62.1469931427.6033.python-list@python.org> <579d7141$0$1606$c3e8da3$5496439d@news.astraweb.com> <CAPTjJmpfr3M5aRXJo0HAivMEsMU=O2Tmki2eWfMFTja_szAWpA@mail.gmail.com>

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On Sun, Jul 31, 2016 at 1:32 PM, Steven D'Aprano <steve@pearwood.info> wrote:
>> It means you can't
>> upgrade something from "always returns None" to "returns the number of
>> objects frobbed" without breaking compat.
>
> You shouldn't ever need to. At least that's the theory. In practice its not
> quite cut and dried. Procedures are for things which purely operate by
> side-effect: they're verbs, doing words:

That's all very well in theory, but as you say, it's far from cut and
dried. Taking the example that started all this off, Python 2 had
'print' as a statement (no return value), but the write method of I/O
streams (eg sys.stdout.write) has a definite and important return
value (the amount written).

As another example, the 'gc' module allows you to trigger garbage
collection immediately. (All examples from CPython. I don't know how
other Pythons handle things, but the specifics don't matter anyway.)
That's very definitely a verb - "go and take out the trash, now" - but
it's a function that returns the number of unreachable objects. More
or less the same concept as write(), in that it does some work and
then returns how much work it did.

So while I agree with Python's decision to make list.sort() return
None rather than the mutated list, I think there's not a dichotomy
here but a spectrum, from "procedure-like" to "function-like". At the
one extreme are control flow statements - it doesn't make any sense
whatsoever to ask about the return value of a "while" statement.
(Though you could define it as the value of the condition expression,
but that's something you want _inside_ the while block, not outside.)
Then you have things that Python has as statements, but which
plausibly could have return values, eg "def" and "class" could return
the function/class. Somewhere toward the middle are gc.collect() and
friends, where you mainly call them for their functionality, not their
return values. Leaning toward functional are the
mutators-with-return-values like list.pop() - there are times when you
don't care about the element, you just want to pop and discard. And
then the most functional of functions would be pure functions like
math.sin(), where they have no side effects whatsoever, just a return
value.

Which ones would you define as procedures and which as functions? Or
can you just define _everything_ as a function, and give them valid,
if meaningless, return values? Yeah.

ChrisA

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Thread

Why not allow empty code blocks? Kent Tong <kent.tong.mo@gmail.com> - 2016-07-22 08:33 -0700
  Re: Why not allow empty code blocks? Rob Gaddi <rgaddi@highlandtechnology.invalid> - 2016-07-22 16:44 +0000
  Re: Why not allow empty code blocks? Steven D'Aprano <steve@pearwood.info> - 2016-07-23 11:49 +1000
    Re: Why not allow empty code blocks? Kent Tong <kent.tong.mo@gmail.com> - 2016-07-22 19:06 -0700
    Re: Why not allow empty code blocks? Marko Rauhamaa <marko@pacujo.net> - 2016-07-23 14:13 +0300
      Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-23 21:34 +1000
        Re: Why not allow empty code blocks? Marko Rauhamaa <marko@pacujo.net> - 2016-07-23 14:49 +0300
        Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-23 15:00 +0100
          Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-24 00:19 +1000
          Re: Why not allow empty code blocks? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-07-29 10:58 +0200
          Re: Why not allow empty code blocks? "D'Arcy J.M. Cain" <darcy@Vex.Net> - 2016-07-29 07:14 -0400
            Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-29 14:15 +0100
              Re: Why not allow empty code blocks? Ian Kelly <ian.g.kelly@gmail.com> - 2016-07-29 07:41 -0600
              Re: Why not allow empty code blocks? Steven D'Aprano <steve@pearwood.info> - 2016-07-29 23:43 +1000
                Re: Why not allow empty code blocks? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-07-29 15:55 +0200
                Re: Why not allow empty code blocks? Steven D'Aprano <steve@pearwood.info> - 2016-07-30 00:38 +1000
                Re: Why not allow empty code blocks? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-07-29 20:32 +0200
                Re: Why not allow empty code blocks? Steven D'Aprano <steve@pearwood.info> - 2016-07-30 13:49 +1000
                Re: Why not allow empty code blocks? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-08-02 09:31 +0200
                Re: Why not allow empty code blocks? "D'Arcy J.M. Cain" <darcy@Vex.Net> - 2016-07-29 12:28 -0400
              Re: Why not allow empty code blocks? "D'Arcy J.M. Cain" <darcy@Vex.Net> - 2016-07-29 12:20 -0400
          Re: Why not allow empty code blocks? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-07-29 15:46 +0200
          Re: Why not allow empty code blocks? Terry Reedy <tjreedy@udel.edu> - 2016-07-29 15:43 -0400
            Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-29 21:19 +0100
              Re: Why not allow empty code blocks? Marko Rauhamaa <marko@pacujo.net> - 2016-07-30 01:01 +0300
              Re: Why not allow empty code blocks? Steven D'Aprano <steve@pearwood.info> - 2016-07-30 13:35 +1000
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-30 11:15 +0100
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-30 21:25 +1000
                Re: Why not allow empty code blocks? Rustom Mody <rustompmody@gmail.com> - 2016-07-30 04:39 -0700
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-30 21:49 +1000
                Re: Why not allow empty code blocks? Rustom Mody <rustompmody@gmail.com> - 2016-07-30 05:11 -0700
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-30 22:22 +1000
                Re: Why not allow empty code blocks? Rustom Mody <rustompmody@gmail.com> - 2016-07-30 05:31 -0700
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-30 22:44 +1000
                Re: Why not allow empty code blocks? Steven D'Aprano <steve@pearwood.info> - 2016-07-31 01:07 +1000
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-30 13:39 +0100
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-30 22:47 +1000
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-30 22:47 +1000
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-30 13:27 +0100
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-30 22:34 +1000
                Re: Why not allow empty code blocks? Steven D'Aprano <steve@pearwood.info> - 2016-07-31 00:58 +1000
                Re: Why not allow empty code blocks? Steven D'Aprano <steve@pearwood.info> - 2016-07-31 00:47 +1000
                Re: Why not allow empty code blocks? Rustom Mody <rustompmody@gmail.com> - 2016-07-30 09:15 -0700
                Re: Why not allow empty code blocks? Rustom Mody <rustompmody@gmail.com> - 2016-07-30 09:29 -0700
                Re: Why not allow empty code blocks? Steven D'Aprano <steve@pearwood.info> - 2016-07-31 03:53 +1000
                Re: Why not allow empty code blocks? Michael Torrie <torriem@gmail.com> - 2016-07-30 12:16 -0600
                Re: Why not allow empty code blocks? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-07-31 13:37 +1200
                Re: Why not allow empty code blocks? Rustom Mody <rustompmody@gmail.com> - 2016-07-30 19:34 -0700
                Re: Why not allow empty code blocks? Steven D'Aprano <steve@pearwood.info> - 2016-07-31 13:14 +1000
                Re: Why not allow empty code blocks? Rustom Mody <rustompmody@gmail.com> - 2016-07-30 20:34 -0700
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-31 14:12 +1000
                Re: Why not allow empty code blocks? Rustom Mody <rustompmody@gmail.com> - 2016-07-30 23:42 -0700
                Re: Why not allow empty code blocks? Paul Rubin <no.email@nospam.invalid> - 2016-07-30 22:10 -0700
                Re: Why not allow empty code blocks? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-07-31 19:39 +1200
                Re: Why not allow empty code blocks? Marko Rauhamaa <marko@pacujo.net> - 2016-07-31 10:51 +0300
                Re: Why not allow empty code blocks? Paul Rubin <no.email@nospam.invalid> - 2016-07-31 01:18 -0700
                Re: Why not allow empty code blocks? Ian Kelly <ian.g.kelly@gmail.com> - 2016-07-31 06:51 -0600
                Re: Why not allow empty code blocks? Paul Rubin <no.email@nospam.invalid> - 2016-07-31 09:23 -0700
                Re: Why not allow empty code blocks? Paul Rubin <no.email@nospam.invalid> - 2016-07-31 01:14 -0700
                Re: Why not allow empty code blocks? Steven D'Aprano <steve@pearwood.info> - 2016-08-01 03:06 +1000
                Re: Why not allow empty code blocks? Paul Rubin <no.email@nospam.invalid> - 2016-07-31 10:32 -0700
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-31 02:37 +1000
                Re: Why not allow empty code blocks? Rustom Mody <rustompmody@gmail.com> - 2016-07-30 09:58 -0700
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-31 03:15 +1000
                Re: Why not allow empty code blocks? Rustom Mody <rustompmody@gmail.com> - 2016-07-30 10:48 -0700
                Re: Why not allow empty code blocks? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-07-31 13:45 +1200
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-31 12:17 +1000
                Procedures and functions [was Re: Why not allow empty code blocks?] Steven D'Aprano <steve@pearwood.info> - 2016-07-31 13:32 +1000
                Re: Procedures and functions [was Re: Why not allow empty code blocks?] "D'Arcy J.M. Cain" <darcy@Vex.Net> - 2016-07-31 00:01 -0400
                Re: Procedures and functions [was Re: Why not allow empty code blocks?] Steven D'Aprano <steve@pearwood.info> - 2016-07-31 16:40 +1000
                Re: Procedures and functions [was Re: Why not allow empty code blocks?] Rustom Mody <rustompmody@gmail.com> - 2016-07-30 23:47 -0700
                Re: Procedures and functions [was Re: Why not allow empty code blocks?] Chris Angelico <rosuav@gmail.com> - 2016-07-31 16:55 +1000
                Re: Procedures and functions [was Re: Why not allow empty code blocks?] Chris Angelico <rosuav@gmail.com> - 2016-07-31 14:05 +1000
                Re: Procedures and functions [was Re: Why not allow empty code blocks?] Random832 <random832@fastmail.com> - 2016-07-31 00:26 -0400
                Re: Why not allow empty code blocks? Random832 <random832@fastmail.com> - 2016-07-30 23:51 -0400
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-31 14:21 +1000
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-30 21:22 +0100
                Re: Why not allow empty code blocks? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-08-02 12:30 +0200
                Re: Why not allow empty code blocks? Rustom Mody <rustompmody@gmail.com> - 2016-08-02 05:29 -0700
                Re: Why not allow empty code blocks? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-08-03 10:26 +0200
                Re: Why not allow empty code blocks? Rustom Mody <rustompmody@gmail.com> - 2016-08-03 04:48 -0700
                Re: Why not allow empty code blocks? Marko Rauhamaa <marko@pacujo.net> - 2016-08-03 15:09 +0300
                Re: Why not allow empty code blocks? Rustom Mody <rustompmody@gmail.com> - 2016-08-03 05:23 -0700
                Re: Why not allow empty code blocks? Rustom Mody <rustompmody@gmail.com> - 2016-08-03 05:27 -0700
                Re: Why not allow empty code blocks? Marko Rauhamaa <marko@pacujo.net> - 2016-08-03 15:37 +0300
                Re: Why not allow empty code blocks? Rustom Mody <rustompmody@gmail.com> - 2016-08-03 05:43 -0700
                Re: Why not allow empty code blocks? Marko Rauhamaa <marko@pacujo.net> - 2016-08-03 15:34 +0300
                {non sequitur/bad humor} was: Why not allow empty code blocks? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2016-08-03 18:01 -0400
                Re: Why not allow empty code blocks? Steven D'Aprano <steve@pearwood.info> - 2016-07-31 02:43 +1000
                Re: Why not allow empty code blocks? Steven D'Aprano <steve@pearwood.info> - 2016-07-30 23:06 +1000
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-30 23:36 +1000
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-30 14:58 +0100
                Re: Why not allow empty code blocks? Steven D'Aprano <steve@pearwood.info> - 2016-07-31 01:48 +1000
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-31 02:34 +1000
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-30 19:46 +0100
                Re: Why not allow empty code blocks? Steven D'Aprano <steve@pearwood.info> - 2016-07-31 12:10 +1000
                Re: Why not allow empty code blocks? Random832 <random832@fastmail.com> - 2016-07-30 23:41 -0400
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-31 11:18 +0100
                Re: Why not allow empty code blocks? Steven D'Aprano <steve@pearwood.info> - 2016-08-01 01:31 +1000
                Re: Why not allow empty code blocks? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2016-07-31 12:39 -0400
                Re: Why not allow empty code blocks? bart4858@gmail.com - 2016-07-31 17:11 -0700
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-08-01 10:21 +1000
                Re: Why not allow empty code blocks? Paul Rubin <no.email@nospam.invalid> - 2016-07-31 17:55 -0700
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-08-01 11:10 +1000
                Re: Why not allow empty code blocks? Paul Rubin <no.email@nospam.invalid> - 2016-07-31 19:09 -0700
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-08-01 12:14 +1000
                Re: Why not allow empty code blocks? bart4858@gmail.com - 2016-08-01 00:55 -0700
                Re: Why not allow empty code blocks? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2016-07-31 22:08 -0400
                Re: Why not allow empty code blocks? Gene Heskett <gheskett@shentel.net> - 2016-07-31 21:29 -0400
                Debugging (was Re: Why not allow empty code blocks?) Terry Reedy <tjreedy@udel.edu> - 2016-07-31 14:58 -0400
                Re: Debugging (was Re: Why not allow empty code blocks?) BartC <bc@freeuk.com> - 2016-08-02 12:05 +0100
                Re: Debugging (was Re: Why not allow empty code blocks?) Chris Angelico <rosuav@gmail.com> - 2016-08-03 00:58 +1000
                Re: Debugging (was Re: Why not allow empty code blocks?) BartC <bc@freeuk.com> - 2016-08-02 18:12 +0100
                Re: Debugging (was Re: Why not allow empty code blocks?) Steven D'Aprano <steve+python@pearwood.info> - 2016-08-03 03:57 +1000
                Re: Debugging (was Re: Why not allow empty code blocks?) BartC <bc@freeuk.com> - 2016-08-02 20:14 +0100
                Re: Debugging (was Re: Why not allow empty code blocks?) Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2016-08-03 15:43 +1000
                Re: Debugging (was Re: Why not allow empty code blocks?) BartC <bc@freeuk.com> - 2016-08-03 11:16 +0100
                Re: Debugging (was Re: Why not allow empty code blocks?) Chris Angelico <rosuav@gmail.com> - 2016-08-03 23:18 +1000
                Re: Debugging (was Re: Why not allow empty code blocks?) Steven D'Aprano <steve+python@pearwood.info> - 2016-08-04 13:23 +1000
                Re: Debugging (was Re: Why not allow empty code blocks?) BartC <bc@freeuk.com> - 2016-08-04 10:13 +0100
                Re: Debugging (was Re: Why not allow empty code blocks?) Chris Angelico <rosuav@gmail.com> - 2016-08-04 19:39 +1000
                Re: Debugging (was Re: Why not allow empty code blocks?) Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2016-08-04 19:38 +1000
                Re: Debugging (was Re: Why not allow empty code blocks?) Terry Reedy <tjreedy@udel.edu> - 2016-08-04 14:37 -0400
                Re: Debugging (was Re: Why not allow empty code blocks?) Chris Angelico <rosuav@gmail.com> - 2016-08-05 04:54 +1000
                Re: Debugging (was Re: Why not allow empty code blocks?) Chris Angelico <rosuav@gmail.com> - 2016-08-03 05:18 +1000
                Re: Debugging (was Re: Why not allow empty code blocks?) Christian Gollwitzer <auriocus@gmx.de> - 2016-08-02 21:55 +0200
                Re: Debugging (was Re: Why not allow empty code blocks?) Chris Angelico <rosuav@gmail.com> - 2016-08-03 06:50 +1000
                Re: Debugging (was Re: Why not allow empty code blocks?) Terry Reedy <tjreedy@udel.edu> - 2016-08-02 17:27 -0400
                Re: Debugging (was Re: Why not allow empty code blocks?) Paul Rubin <no.email@nospam.invalid> - 2016-08-02 14:54 -0700
                Re: Debugging (was Re: Why not allow empty code blocks?) BartC <bc@freeuk.com> - 2016-08-02 23:38 +0100
                Re: Debugging (was Re: Why not allow empty code blocks?) Chris Angelico <rosuav@gmail.com> - 2016-08-01 05:03 +1000
                Re: Why not allow empty code blocks? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-07-31 15:12 +1200
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-31 14:07 +1000
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-30 15:16 +0100
                Re: Why not allow empty code blocks? Steven D'Aprano <steve@pearwood.info> - 2016-07-31 02:08 +1000
                Re: Why not allow empty code blocks? Steven D'Aprano <steve@pearwood.info> - 2016-07-31 02:10 +1000
                Re: Why not allow empty code blocks? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-07-31 15:10 +1200
                Re: Why not allow empty code blocks? "D'Arcy J.M. Cain" <darcy@Vex.Net> - 2016-07-30 10:39 -0400
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-30 16:14 +0100
                Re: Why not allow empty code blocks? "D'Arcy J.M. Cain" <darcy@Vex.Net> - 2016-07-30 13:11 -0400
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-30 19:15 +0100
                Re: Why not allow empty code blocks? Gordon Levi <gordon@address.invalid> - 2016-08-01 00:25 +1000
                Re: Why not allow empty code blocks? "D'Arcy J.M. Cain" <darcy@Vex.Net> - 2016-07-31 11:53 -0400
                Re: Why not allow empty code blocks? Gordon Levi <gordon@address.invalid> - 2016-08-03 23:38 +1000
                Re: Why not allow empty code blocks? "D'Arcy J.M. Cain" <darcy@Vex.Net> - 2016-07-31 12:04 -0400
                Re: Why not allow empty code blocks? Paul Rubin <no.email@nospam.invalid> - 2016-07-31 09:27 -0700
                Re: Why not allow empty code blocks? Gordon Levi <gordon@address.invalid> - 2016-08-02 01:30 +1000
                Using valid emails "D'Arcy J.M. Cain" <darcy@Vex.Net> - 2016-08-01 12:05 -0400
                Re: Using valid emails Chris Angelico <rosuav@gmail.com> - 2016-08-02 02:22 +1000
                Re: Using valid emails Marko Rauhamaa <marko@pacujo.net> - 2016-08-01 22:16 +0300
                Re: Using valid emails "D'Arcy J.M. Cain" <darcy@Vex.Net> - 2016-08-01 12:40 -0400
                Re: Why not allow empty code blocks? Marko Rauhamaa <marko@pacujo.net> - 2016-08-01 22:14 +0300
                Re: Why not allow empty code blocks? Marko Rauhamaa <marko@pacujo.net> - 2016-07-31 19:41 +0300
                Re: Why not allow empty code blocks? Steven D'Aprano <steve@pearwood.info> - 2016-08-01 03:22 +1000
                Re: Why not allow empty code blocks? "Jan Erik Moström" <lists@mostrom.pp.se> - 2016-07-31 20:58 +0200
                Re: Why not allow empty code blocks? Michael Torrie <torriem@gmail.com> - 2016-07-31 14:01 -0600
                Re: Why not allow empty code blocks? bart4858@gmail.com - 2016-07-31 16:43 -0700
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-08-01 09:49 +1000
                Re: Why not allow empty code blocks? bart4858@gmail.com - 2016-07-31 17:21 -0700
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-08-01 10:33 +1000
                Re: Why not allow empty code blocks? bart4858@gmail.com - 2016-08-01 01:05 -0700
                Re: Why not allow empty code blocks? alister <alister.ware@ntlworld.com> - 2016-08-01 09:50 +0000
                Re: Why not allow empty code blocks? bart4858@gmail.com - 2016-08-01 06:26 -0700
                Re: Why not allow empty code blocks? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2016-08-01 20:12 +1000
                Re: Why not allow empty code blocks? bart4858@gmail.com - 2016-08-01 06:19 -0700
                Re: Why not allow empty code blocks? bartc <bart4858@gmail.com> - 2016-08-01 13:22 -0700
                Re: Why not allow empty code blocks? Rustom Mody <rustompmody@gmail.com> - 2016-08-02 06:28 -0700
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-08-02 17:56 +0100
                Re: Why not allow empty code blocks? Steven D'Aprano <steve+python@pearwood.info> - 2016-08-03 03:54 +1000
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-08-03 05:10 +1000
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-08-02 20:19 +0100
                Re: Why not allow empty code blocks? Grant Edwards <grant.b.edwards@gmail.com> - 2016-08-02 19:38 +0000
                Re: Why not allow empty code blocks? lists@juliensalort.org (Julien Salort) - 2016-08-02 21:45 +0200
                Re: Why not allow empty code blocks? Steven D'Aprano <steve+python@pearwood.info> - 2016-08-03 03:50 +1000
                Re: Why not allow empty code blocks? Paul Rubin <no.email@nospam.invalid> - 2016-08-02 12:22 -0700
                Re: Why not allow empty code blocks? Rustom Mody <rustompmody@gmail.com> - 2016-08-03 03:02 -0700
                Re: Why not allow empty code blocks? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2016-08-03 18:58 +1000
                Re: Why not allow empty code blocks? Rustom Mody <rustompmody@gmail.com> - 2016-08-03 05:16 -0700
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-08-03 22:36 +1000
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-08-03 14:04 +0100
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-08-03 23:25 +1000
                Re: Why not allow empty code blocks? Grant Edwards <grant.b.edwards@gmail.com> - 2016-08-03 14:06 +0000
                Re: Why not allow empty code blocks? alister <alister.ware@ntlworld.com> - 2016-08-03 20:40 +0000
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-08-03 14:23 +0100
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-08-03 23:31 +1000
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-08-03 19:52 +0100
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-08-04 06:12 +1000
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-08-03 21:53 +0100
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-08-04 07:39 +1000
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-08-03 23:21 +0100
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-08-04 08:31 +1000
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-08-04 00:51 +0100
                Re: Why not allow empty code blocks? Paul Rubin <no.email@nospam.invalid> - 2016-08-03 16:25 -0700
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-08-04 00:48 +0100
                Re: Why not allow empty code blocks? alister <alister.ware@ntlworld.com> - 2016-08-01 09:40 +0000
                Using valid emails "D'Arcy J.M. Cain" <darcy@Vex.Net> - 2016-08-01 12:32 -0400
                Re: Using valid emails Michael Torrie <torriem@gmail.com> - 2016-08-01 12:38 -0600
                Re: Using valid emails "D'Arcy J.M. Cain" <darcy@Vex.Net> - 2016-08-01 15:27 -0400
        Re: Why not allow empty code blocks? Rob Gaddi <rgaddi@highlandtechnology.invalid> - 2016-07-28 20:01 +0000
          Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-29 06:11 +1000
      Detecting the trivial can be non-trivial (was Why not allow empty code blocks?) Rustom Mody <rustompmody@gmail.com> - 2016-07-23 05:28 -0700
        Re: Detecting the trivial can be non-trivial (was Why not allow empty code blocks?) Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-24 11:15 +0100
          Re: Detecting the trivial can be non-trivial (was Why not allow empty code blocks?) Rustom Mody <rustompmody@gmail.com> - 2016-07-24 07:49 -0700
      Re: Why not allow empty code blocks? "D'Arcy J.M. Cain" <darcy@Vex.Net> - 2016-07-23 08:29 -0400
        Re: Why not allow empty code blocks? Marko Rauhamaa <marko@pacujo.net> - 2016-07-23 16:13 +0300
          Re: Why not allow empty code blocks? "D'Arcy J.M. Cain" <darcy@Vex.Net> - 2016-07-23 09:54 -0400
            Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-23 15:06 +0100
              Re: Why not allow empty code blocks? Steven D'Aprano <steve@pearwood.info> - 2016-07-24 01:55 +1000
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-24 11:35 +0100
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-24 11:45 +0100
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-24 21:27 +1000
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-24 14:09 +0100
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-24 23:24 +1000
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-24 15:05 +0100
                Re: Why not allow empty code blocks? Steven D'Aprano <steve@pearwood.info> - 2016-07-25 00:32 +1000
                Re: Why not allow empty code blocks? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-07-25 12:40 +1200
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-25 02:14 +0100
                Re: Why not allow empty code blocks? Ben Finney <ben+python@benfinney.id.au> - 2016-07-25 11:45 +1000
                Re: Why not allow empty code blocks? Rustom Mody <rustompmody@gmail.com> - 2016-07-25 09:54 -0700
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-26 03:02 +1000
                Re: Why not allow empty code blocks? Rustom Mody <rustompmody@gmail.com> - 2016-07-25 10:11 -0700
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-26 03:26 +1000
                Re: Why not allow empty code blocks? Rustom Mody <rustompmody@gmail.com> - 2016-07-25 19:43 -0700
                Re: Why not allow empty code blocks? Michael Torrie <torriem@gmail.com> - 2016-07-24 20:48 -0600
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-25 13:12 +1000
                Re: Why not allow empty code blocks? Rustom Mody <rustompmody@gmail.com> - 2016-07-24 20:20 -0700
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-25 13:28 +1000
                Re: Why not allow empty code blocks? Rustom Mody <rustompmody@gmail.com> - 2016-07-24 20:46 -0700
                Re: Why not allow empty code blocks? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2016-07-25 17:20 +1000
                Re: Why not allow empty code blocks? Steven D'Aprano <steve@pearwood.info> - 2016-07-25 14:27 +1000
                Re: Why not allow empty code blocks? neceros@gmail.com - 2016-07-24 11:27 -0700
                Re: Why not allow empty code blocks? Steven D'Aprano <steve@pearwood.info> - 2016-07-24 22:17 +1000
                Re: Why not allow empty code blocks? Joel Goldstick <joel.goldstick@gmail.com> - 2016-07-24 08:28 -0400
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-24 22:48 +1000
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-24 23:38 +1000
                Re: Why not allow empty code blocks? Marco Sulla <mail.python.org@marco.sulla.e4ward.com> - 2016-07-24 15:11 +0200
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-24 15:44 +0100
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-25 00:51 +1000
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-24 19:14 +0100
                Re: Why not allow empty code blocks? Jonathan Hayward <jonathan.hayward@pobox.com> - 2016-07-24 13:34 -0500
                Re: Why not allow empty code blocks? alister <alister.ware@ntlworld.com> - 2016-07-24 18:52 +0000
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-25 05:00 +1000
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-24 21:03 +0100
                Re: Why not allow empty code blocks? Chris Angelico <rosuav@gmail.com> - 2016-07-25 07:08 +1000
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-24 23:13 +0100
                Re: Why not allow empty code blocks? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-07-25 13:04 +1200
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-25 10:44 +0100
                Re: Why not allow empty code blocks? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-07-26 19:21 +1200
                Re: Why not allow empty code blocks? Marko Rauhamaa <marko@pacujo.net> - 2016-07-26 10:56 +0300
                Re: Why not allow empty code blocks? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-07-26 20:35 +1200
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-26 11:11 +0100
                Re: Why not allow empty code blocks? Steven D'Aprano <steve@pearwood.info> - 2016-07-25 12:37 +1000
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-25 11:39 +0100
                Re: Why not allow empty code blocks? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-07-26 19:23 +1200
                Re: Why not allow empty code blocks? Random832 <random832@fastmail.com> - 2016-07-25 10:36 -0400
                Re: Why not allow empty code blocks? BartC <bc@freeuk.com> - 2016-07-25 18:33 +0100
                Re: Why not allow empty code blocks? Rustom Mody <rustompmody@gmail.com> - 2016-07-24 17:56 -0700
                Re: Why not allow empty code blocks? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-07-26 16:31 +0200

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