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Re: unicode as valid naming symbols

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Date Wed, 26 Mar 2014 09:52:25 +0100
From Antoon Pardon <antoon.pardon@rece.vub.ac.be>
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Subject Re: unicode as valid naming symbols
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On 26-03-14 03:56, MRAB wrote:
> On 2014-03-25 22:47, Ethan Furman wrote:
>> On 03/25/2014 12:29 PM, Mark H Harris wrote:
>>> On 3/25/14 2:24 PM, MRAB wrote:
>>>> It's explained in PEP 3131.
>>>>
>>>> Basically, a name should to start with a letter (this has been
>>>> extended
>>>> to include Chinese characters, etc) or an underscore.
>>>>
>>>> λ is a classified as Lowercase_Letter.
>>>>
>>>> √ is classified as Math_Symbol.
>>>
>>>     Thanks much!  I'll note that for improvements. Any unicode
>>> symbol (that is not a number) should be allowed as an
>>> identifier.
>>
>> No, it shouldn't.  Doing so would mean we could not use √ as the
>> square root operator in the future.
>>
> Or as a root operator, e.g. 3 √ x (the cube root of x).
>
Personally I would think such an operator is too limited to include in a programming language.
This kind of notation is only used with a constant to indicate what kind of root is taken and
only with positive integers. Something like the equivallent of the following I have never seen.

  t = 2.5
  x = 8.2
  y = t √ x

Of course we don't have to follow mathematical convention with python. However allowing any
unicode symbol as an identifier doesn't prohibit from using √ as an operator. We do have
"in" and "is" as operators now, even if they would otherwise be acceptable identifiers.
So I wonder, would you consider to introduce log as an operator. 2 log x seems an interesting
operation for a programmer.

-- 
Antoon Pardon

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Thread

unicode as valid naming symbols Mark H Harris <harrismh777@gmail.com> - 2014-03-25 13:30 -0500
  Re: unicode as valid naming symbols wxjmfauth@gmail.com - 2014-03-25 11:52 -0700
    Re: unicode as valid naming symbols Mark H Harris <harrismh777@gmail.com> - 2014-03-25 14:24 -0500
    Re: unicode as valid naming symbols Rustom Mody <rustompmody@gmail.com> - 2014-03-25 19:16 -0700
  Re: unicode as valid naming symbols MRAB <python@mrabarnett.plus.com> - 2014-03-25 19:24 +0000
    Re: unicode as valid naming symbols Mark H Harris <harrismh777@gmail.com> - 2014-03-25 14:29 -0500
      Re: unicode as valid naming symbols Marko Rauhamaa <marko@pacujo.net> - 2014-03-25 21:48 +0200
        Re: unicode as valid naming symbols Skip Montanaro <skip@pobox.com> - 2014-03-25 14:54 -0500
        Re: unicode as valid naming symbols Cameron Simpson <cs@zip.com.au> - 2014-03-26 09:16 +1100
      Re: unicode as valid naming symbols Ian Kelly <ian.g.kelly@gmail.com> - 2014-03-25 13:49 -0600
      Re: unicode as valid naming symbols Tim Chase <python.list@tim.thechases.com> - 2014-03-25 15:29 -0500
      Re: unicode as valid naming symbols Ethan Furman <ethan@stoneleaf.us> - 2014-03-25 15:47 -0700
      Re: unicode as valid naming symbols Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-03-25 23:58 +0000
        Re: unicode as valid naming symbols Mark H Harris <harrismh777@gmail.com> - 2014-03-27 10:28 -0500
          Re: unicode as valid naming symbols Rustom Mody <rustompmody@gmail.com> - 2014-03-27 08:51 -0700
            Re: unicode as valid naming symbols Mark H Harris <harrismh777@gmail.com> - 2014-03-27 11:03 -0500
              Re: unicode as valid naming symbols Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-03-28 12:45 +1300
            Re: unicode as valid naming symbols MRAB <python@mrabarnett.plus.com> - 2014-03-27 17:17 +0000
              Re: unicode as valid naming symbols Rustom Mody <rustompmody@gmail.com> - 2014-03-27 10:53 -0700
          Re: unicode as valid naming symbols Ian Kelly <ian.g.kelly@gmail.com> - 2014-03-27 10:22 -0600
            Re: unicode as valid naming symbols Rustom Mody <rustompmody@gmail.com> - 2014-03-27 10:41 -0700
          Re: unicode as valid naming symbols Chris Angelico <rosuav@gmail.com> - 2014-03-28 03:23 +1100
          Re: unicode as valid naming symbols Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2014-03-31 11:55 +0200
          Re: unicode as valid naming symbols Ian Kelly <ian.g.kelly@gmail.com> - 2014-03-31 11:40 -0600
          Re: unicode as valid naming symbols Tim Chase <python.list@tim.thechases.com> - 2014-03-31 13:02 -0500
          Re: unicode as valid naming symbols Ian Kelly <ian.g.kelly@gmail.com> - 2014-03-31 12:10 -0600
          Re: unicode as valid naming symbols Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2014-03-31 21:31 +0200
          Re: unicode as valid naming symbols Terry Reedy <tjreedy@udel.edu> - 2014-03-31 16:12 -0400
          Re: unicode as valid naming symbols Terry Reedy <tjreedy@udel.edu> - 2014-03-31 16:15 -0400
            Re: unicode as valid naming symbols Marko Rauhamaa <marko@pacujo.net> - 2014-03-31 23:34 +0300
          Re: unicode as valid naming symbols Ian Kelly <ian.g.kelly@gmail.com> - 2014-03-31 18:47 -0600
          Re: unicode as valid naming symbols David Hutto <dwightdhutto@gmail.com> - 2014-03-31 23:58 -0400
          Re: unicode as valid naming symbols David Hutto <dwightdhutto@gmail.com> - 2014-04-01 00:11 -0400
          Re: unicode as valid naming symbols Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2014-04-01 10:19 +0200
          Re: unicode as valid naming symbols Ian Kelly <ian.g.kelly@gmail.com> - 2014-04-01 03:18 -0600
            Re: unicode as valid naming symbols Marko Rauhamaa <marko@pacujo.net> - 2014-04-01 12:32 +0300
              Re: unicode as valid naming symbols Ian Kelly <ian.g.kelly@gmail.com> - 2014-04-01 03:58 -0600
                Re: unicode as valid naming symbols Marko Rauhamaa <marko@pacujo.net> - 2014-04-01 15:02 +0300
                Re: unicode as valid naming symbols Chris Angelico <rosuav@gmail.com> - 2014-04-01 23:54 +1100
                Re: unicode as valid naming symbols Marko Rauhamaa <marko@pacujo.net> - 2014-04-01 16:16 +0300
                Re: unicode as valid naming symbols Chris Angelico <rosuav@gmail.com> - 2014-04-02 00:32 +1100
                Re: unicode as valid naming symbols Marko Rauhamaa <marko@pacujo.net> - 2014-04-01 18:59 +0300
                Re: unicode as valid naming symbols Rustom Mody <rustompmody@gmail.com> - 2014-04-01 19:58 -0700
                Re: unicode as valid naming symbols Rustom Mody <rustompmody@gmail.com> - 2014-04-01 20:16 -0700
                Re: unicode as valid naming symbols Marko Rauhamaa <marko@pacujo.net> - 2014-04-02 08:55 +0300
              Re: unicode as valid naming symbols Chris Angelico <rosuav@gmail.com> - 2014-04-01 21:39 +1100
          Re: unicode as valid naming symbols Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2014-04-01 12:37 +0200
          Re: unicode as valid naming symbols Chris Angelico <rosuav@gmail.com> - 2014-04-01 21:58 +1100
          Re: unicode as valid naming symbols Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2014-04-01 13:59 +0200
            Re: unicode as valid naming symbols Roy Smith <roy@panix.com> - 2014-04-01 08:29 -0400
              Re: unicode as valid naming symbols Chris Angelico <rosuav@gmail.com> - 2014-04-02 00:08 +1100
                Re: unicode as valid naming symbols Rustom Mody <rustompmody@gmail.com> - 2014-04-01 06:34 -0700
          Re: unicode as valid naming symbols Chris Angelico <rosuav@gmail.com> - 2014-04-02 00:00 +1100
          Re: unicode as valid naming symbols Ned Batchelder <ned@nedbatchelder.com> - 2014-04-01 09:33 -0400
          Re: unicode as valid naming symbols Chris Angelico <rosuav@gmail.com> - 2014-04-02 00:44 +1100
            Re: unicode as valid naming symbols Rustom Mody <rustompmody@gmail.com> - 2014-04-01 06:58 -0700
          Re: unicode as valid naming symbols Ian Kelly <ian.g.kelly@gmail.com> - 2014-04-01 09:53 -0600
      Re: unicode as valid naming symbols MRAB <python@mrabarnett.plus.com> - 2014-03-26 02:56 +0000
      Re: unicode as valid naming symbols Chris Angelico <rosuav@gmail.com> - 2014-03-26 14:09 +1100
      Re: unicode as valid naming symbols Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2014-03-26 09:25 +0100
      Re: unicode as valid naming symbols Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2014-03-26 09:52 +0100
      Re: unicode as valid naming symbols Ian Kelly <ian.g.kelly@gmail.com> - 2014-03-26 10:37 -0600
      Re: unicode as valid naming symbols Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2014-03-27 10:36 +0100
        Re: unicode as valid naming symbols Rustom Mody <rustompmody@gmail.com> - 2014-03-27 08:10 -0700
          Re: unicode as valid naming symbols Tim Chase <python.list@tim.thechases.com> - 2014-03-27 10:34 -0500
          Re: unicode as valid naming symbols random832@fastmail.us - 2014-03-28 14:55 -0400
            Re: unicode as valid naming symbols Rustom Mody <rustompmody@gmail.com> - 2014-03-28 22:00 -0700
              Re: unicode as valid naming symbols Chris Angelico <rosuav@gmail.com> - 2014-03-29 16:12 +1100
              Re: unicode as valid naming symbols Ben Finney <ben+python@benfinney.id.au> - 2014-03-29 16:32 +1100
              Re: unicode as valid naming symbols Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-03-29 14:11 -0400
              Re: unicode as valid naming symbols Chris Angelico <rosuav@gmail.com> - 2014-03-30 09:01 +1100
                Re: unicode as valid naming symbols Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-03-30 19:16 +1300
    Re: unicode as valid naming symbols Mark H Harris <harrismh777@gmail.com> - 2014-03-25 14:29 -0500
  Re:unicode as valid naming symbols Dave Angel <davea@davea.name> - 2014-03-25 15:45 -0400
  Re: unicode as valid naming symbols Terry Reedy <tjreedy@udel.edu> - 2014-03-25 22:26 -0400

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