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Groups > comp.lang.python > #112122

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

From Random832 <random832@fastmail.com>
Newsgroups comp.lang.python
Subject Re: Procedures and functions [was Re: Why not allow empty code blocks?]
Date 2016-07-31 00:26 -0400
Message-ID <mailman.70.1469939179.6033.python-list@python.org> (permalink)
References (15 earlier) <CAPTjJmo1fkFQdMUWo6yEc9MaLZMvZqpso+0QXw24-xEEm7erdg@mail.gmail.com> <mailman.62.1469931427.6033.python-list@python.org> <579d7141$0$1606$c3e8da3$5496439d@news.astraweb.com> <20160731000133.276c46f0@imp> <1469939177.1081035.681545073.1E128CBD@webmail.messagingengine.com>

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On Sun, Jul 31, 2016, at 00:01, D'Arcy J.M. Cain wrote:
> On Sun, 31 Jul 2016 13:32:16 +1000
> Steven D'Aprano <steve@pearwood.info> wrote:
> > Many beginners make the mistake of writing:
> > 
> > mylist = mylist.sort()
> > 
> > or try to write:
> > 
> > mylist.sort().reverse()
> > 
> > If we had procedures, that would be an obvious error (possibly even a
> > compile-time syntax error) instead of a perplexing source of mystery
> > bugs.
> 
> While neither is a syntax error, the latter is definitely a run-time
> error:

The only way to make it a syntax error would be to have a different
syntax for *calling* procedures. Barring that, all you can do is make
the first one a run-time error.

As Python is a dynamic language, mylist.sort is an object which is
resolved at runtime. When you call this object, its __call__ method is
called and returns the None object. This object is valid for very few
operations (it can be assigned to a variable [or returned], treated as a
boolean, compared for equality, or converted to a string).

In some other languages, procedures have a static return type (often
called "void") which is valid for even fewer operations. You can use it
as a statement expression or within certain contexts (the left side of
C's comma operator, for example) where the value of an expression is
always discarded.

In a hypothetical Python with procedures but no separate syntax for
calling them, you would need to define the __call__ protocol in a way
that it can indicate that the called object is a procedure. Though, it
could probably be handled at the python level by just allowing "return"
or running off the end to do this, requiring "return None" for the
explicit return of a None object.. The real cost is, it would require
that any operation (such as assigning as a variable, checking it as a
boolean, etc) other than discarding it (including returning it, so you'd
need extra bytecode to check rather than merely leaving tail returns on
the stack) check immediately raise an error. This would add extra
processing to nearly all call sites.

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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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