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Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax]

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From Terry Reedy <tjreedy@udel.edu>
Subject Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax]
Date Thu, 15 Dec 2011 18:15:01 -0500
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On 12/15/2011 6:04 AM, rusi wrote:
> On Dec 15, 3:58 pm, Chris Angelico<ros...@gmail.com>  wrote:
>> On Thu, Dec 15, 2011 at 9:47 PM, Robert Kern<robert.k...@gmail.com>  wrote:
>>>   42 = 2 mod 5
>>>   2 = 42 mod 5
>>
>> It might make more sense to programmers if you think of it as written:
>>
>> 42 = 2, mod 5
>> 2 = 42, mod 5

Better, using ascii text, would be
42 =mod5 2
where =mod is a parameterized equivalence relation that is coarser than 
= (which is =mod-infinity). divmod(a,inf) = 0,a.
=mod1 is the most coarse relation in that it make every count 
equivalent. divmod(a,1) = a,1.

> For the record I should say that the guy who taught me abstract
> algebra, said about as much:
> He said that the notation
> a == b mod n
> should be written as
> a ==n b
> (read the == as 3 horizontal lines and the n as a subscript)

The 3 horizontal line symbol is often used for equivalence relations 
other than =.

-- 
Terry Jan Reedy

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Thread

Verbose and flexible args and kwargs syntax Eelco Hoogendoorn <hoogendoorn.eelco@gmail.com> - 2011-12-12 00:44 +0100
  Re: Verbose and flexible args and kwargs syntax Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-12-12 01:11 +0000
    Re: Verbose and flexible args and kwargs syntax Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2011-12-12 21:09 +1300
      Re: Verbose and flexible args and kwargs syntax Terry Reedy <tjreedy@udel.edu> - 2011-12-12 10:36 -0500
      Re: Verbose and flexible args and kwargs syntax Nick Dokos <nicholas.dokos@hp.com> - 2011-12-12 10:55 -0500
      Re: Verbose and flexible args and kwargs syntax Arnaud Delobelle <arnodel@gmail.com> - 2011-12-12 16:15 +0000
      Re: Verbose and flexible args and kwargs syntax Chris Angelico <rosuav@gmail.com> - 2011-12-13 03:16 +1100
      Re: Verbose and flexible args and kwargs syntax Chris Angelico <rosuav@gmail.com> - 2011-12-13 03:19 +1100
    Re: Verbose and flexible args and kwargs syntax Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-12 04:21 -0800
      Re: Verbose and flexible args and kwargs syntax Ian Kelly <ian.g.kelly@gmail.com> - 2011-12-12 11:09 -0700
        Re: Verbose and flexible args and kwargs syntax Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-12 10:17 -0800
          Re: Verbose and flexible args and kwargs syntax Ian Kelly <ian.g.kelly@gmail.com> - 2011-12-12 11:35 -0700
            Re: Verbose and flexible args and kwargs syntax Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-12 10:51 -0800
              Re: Verbose and flexible args and kwargs syntax Ian Kelly <ian.g.kelly@gmail.com> - 2011-12-12 17:34 -0700
                Re: Verbose and flexible args and kwargs syntax Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-13 00:31 -0800
            Re: Verbose and flexible args and kwargs syntax Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-12 11:05 -0800
              Re: Verbose and flexible args and kwargs syntax Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-12 11:20 -0800
      Re: Verbose and flexible args and kwargs syntax alex23 <wuwei23@gmail.com> - 2011-12-12 15:54 -0800
      Re: Verbose and flexible args and kwargs syntax Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-12-13 02:43 +0000
        Re: Verbose and flexible args and kwargs syntax Chris Angelico <rosuav@gmail.com> - 2011-12-13 14:08 +1100
        Re: Verbose and flexible args and kwargs syntax Ian Kelly <ian.g.kelly@gmail.com> - 2011-12-12 21:52 -0700
        Re: Verbose and flexible args and kwargs syntax Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-13 01:15 -0800
          Re: Verbose and flexible args and kwargs syntax Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-13 01:50 -0800
            Re: Verbose and flexible args and kwargs syntax Arnaud Delobelle <arnodel@gmail.com> - 2011-12-13 10:15 +0000
              Re: Verbose and flexible args and kwargs syntax Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-13 02:39 -0800
              Re: Verbose and flexible args and kwargs syntax Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-13 02:46 -0800
                Re: Verbose and flexible args and kwargs syntax Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-12-13 11:28 +0000
                Re: Verbose and flexible args and kwargs syntax Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-13 04:19 -0800
          Re: Verbose and flexible args and kwargs syntax Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-12-13 11:13 +0000
            Re: Verbose and flexible args and kwargs syntax Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-13 04:47 -0800
              Re: Verbose and flexible args and kwargs syntax Chris Angelico <rosuav@gmail.com> - 2011-12-14 00:14 +1100
                Re: Verbose and flexible args and kwargs syntax Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-13 05:35 -0800
    Re: Verbose and flexible args and kwargs syntax "OKB (not okblacke)" <brenNOSPAMbarn@NObrenSPAMbarn.net> - 2011-12-12 19:45 +0000
  Re: Verbose and flexible args and kwargs syntax Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2011-12-12 12:59 +0200
    Re: Verbose and flexible args and kwargs syntax Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-12 03:22 -0800
      Re: Verbose and flexible args and kwargs syntax Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2011-12-12 13:46 +0200
    Re: Verbose and flexible args and kwargs syntax Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-12 03:18 -0800
    Re: Verbose and flexible args and kwargs syntax Terry Reedy <tjreedy@udel.edu> - 2011-12-12 10:39 -0500
      Re: Verbose and flexible args and kwargs syntax Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2011-12-12 18:52 +0200
        Re: Verbose and flexible args and kwargs syntax Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-12 09:29 -0800
          Re: Verbose and flexible args and kwargs syntax Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2011-12-12 20:09 +0200
          % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-12-14 03:18 +0000
            Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-13 23:49 -0800
              Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Arnaud Delobelle <arnodel@gmail.com> - 2011-12-14 11:55 +0000
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-14 04:33 -0800
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Arnaud Delobelle <arnodel@gmail.com> - 2011-12-14 16:13 +0000
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-14 09:15 -0800
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] rusi <rustompmody@gmail.com> - 2011-12-14 19:43 -0800
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-15 01:44 -0800
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] rusi <rustompmody@gmail.com> - 2011-12-15 02:56 -0800
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-15 03:37 -0800
            Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2011-12-14 10:56 +0200
              Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-14 02:09 -0800
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2011-12-14 14:22 +0200
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-14 04:41 -0800
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-12-14 12:38 +0000
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-14 05:29 -0800
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Chris Angelico <rosuav@gmail.com> - 2011-12-15 00:39 +1100
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Ian Kelly <ian.g.kelly@gmail.com> - 2011-12-14 08:45 -0700
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Terry Reedy <tjreedy@udel.edu> - 2011-12-14 15:57 -0500
              Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] rusi <rustompmody@gmail.com> - 2011-12-14 03:47 -0800
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Chris Angelico <rosuav@gmail.com> - 2011-12-14 22:53 +1100
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2011-12-14 15:09 +0200
              Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-12-14 12:32 +0000
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2011-12-14 15:21 +0200
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Robert Kern <robert.kern@gmail.com> - 2011-12-15 10:47 +0000
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-15 02:59 -0800
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] alex23 <wuwei23@gmail.com> - 2011-12-15 18:14 -0800
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] MRAB <python@mrabarnett.plus.com> - 2011-12-16 02:58 +0000
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-16 02:36 -0800
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Chris Angelico <rosuav@gmail.com> - 2011-12-16 16:01 +1100
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] alex23 <wuwei23@gmail.com> - 2011-12-15 21:30 -0800
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-16 02:25 -0800
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] rusi <rustompmody@gmail.com> - 2011-12-16 09:38 -0800
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-16 11:40 -0800
                Re: % is not an operator [was Re: Verbose and flexible args and   kwargs syntax] Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2011-12-17 12:49 +1300
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Eelco <hoogendoorn.eelco@gmail.com> - 2011-12-16 16:00 -0800
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Roy Smith <roy@panix.com> - 2011-12-16 19:03 -0500
                Re: % is not an operator [was Re: Verbose and flexible args and   kwargs syntax] Grant Edwards <invalid@invalid.invalid> - 2011-12-17 20:02 +0000
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-12-17 00:54 +0000
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] David Robinow <drobinow@gmail.com> - 2011-12-16 21:11 -0500
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Chris Angelico <rosuav@gmail.com> - 2011-12-15 21:58 +1100
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] rusi <rustompmody@gmail.com> - 2011-12-15 03:04 -0800
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2011-12-15 14:48 +0200
                Re: % is not an operator [was Re: Verbose and flexible args and kwargs syntax] Terry Reedy <tjreedy@udel.edu> - 2011-12-15 18:15 -0500
            Re: % is not an operator Paul Rudin <paul.nospam@rudin.co.uk> - 2011-12-14 09:43 +0000
        Re: Verbose and flexible args and kwargs syntax Nick Dokos <nicholas.dokos@hp.com> - 2011-12-12 12:58 -0500
          Re: Verbose and flexible args and kwargs syntax Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2011-12-14 11:04 +0200
  Re: Verbose and flexible args and kwargs syntax gene heskett <gheskett@wdtv.com> - 2011-12-12 12:46 -0500
  Re: Verbose and flexible args and kwargs syntax Dave Angel <d@davea.name> - 2011-12-12 13:04 -0500
  Re: Verbose and flexible args and kwargs syntax Nick Dokos <nicholas.dokos@hp.com> - 2011-12-12 13:02 -0500

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