Different names for Unicode codepoint

Different names for Unicode codepoint

[Lele Gaifax]

Hi,

is there a particular reason for the slightly different names that Emacs
(version 25.0.92) and Python (version 3.6.0a0) give to a single Unicode entity?

Just to mention one codepoint, ⋖ is called "LESS THAN WITH DOT" accordingly to
Emacs' C-x 8 RET TAB menu, while in Python:

    >>> import unicodedata
    >>> unicodedata.name('⋖')
    'LESS-THAN WITH DOT'
    >>> print("\N{LESS THAN WITH DOT}")
      File "<stdin>", line 1
    SyntaxError: (unicode error) ...: unknown Unicode character name

ciao, lele.
-- 
nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri
real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia.
lele@metapensiero.it  |                 -- Fortunato Depero, 1929.

Re: Different names for Unicode codepoint

[Eli Zaretskii]

> From: Lele Gaifax <lele@metapensiero.it>
> Date: Thu, 21 Apr 2016 21:04:32 +0200
> Cc: python-list@python.org
> 
> is there a particular reason for the slightly different names that Emacs
> (version 25.0.92) and Python (version 3.6.0a0) give to a single Unicode entity?

They don't.

> Just to mention one codepoint, ⋖ is called "LESS THAN WITH DOT" accordingly to
> Emacs' C-x 8 RET TAB menu, while in Python:
> 
>     >>> import unicodedata
>     >>> unicodedata.name('⋖')
>     'LESS-THAN WITH DOT'
>     >>> print("\N{LESS THAN WITH DOT}")
>       File "<stdin>", line 1
>     SyntaxError: (unicode error) ...: unknown Unicode character name

Emacs shows both the "Name" and the "Old Name" properties of
characters as completion candidates, while Python evidently supports
only "Name".  If you type "C-x 8 RET LESS TAB", then you will see
among the completion candidates both "LESS THAN WITH DOT" and
"LESS-THAN WITH DOT".  The former is the "old name" of this character,
according to the Unicode Character Database (which is where Emacs
obtains the names and other properties of characters).

Re: Different names for Unicode codepoint

[Lele Gaifax]

Eli Zaretskii <eliz@gnu.org> writes:

> Emacs shows both the "Name" and the "Old Name" properties of
> characters as completion candidates, while Python evidently supports
> only "Name".  If you type "C-x 8 RET LESS TAB", then you will see
> among the completion candidates both "LESS THAN WITH DOT" and
> "LESS-THAN WITH DOT".  The former is the "old name" of this character,
> according to the Unicode Character Database (which is where Emacs
> obtains the names and other properties of characters).

Thank you Eli, didn't notice!

ciao, lele.
-- 
nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri
real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia.
lele@metapensiero.it  |                 -- Fortunato Depero, 1929.

Re: Different names for Unicode codepoint

[tomas]

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On Thu, Apr 21, 2016 at 09:04:32PM +0200, Lele Gaifax wrote:
> Hi,
> 
> is there a particular reason for the slightly different names that Emacs
> (version 25.0.92) and Python (version 3.6.0a0) give to a single Unicode entity?
> 
> Just to mention one codepoint, ⋖ is called "LESS THAN WITH DOT" accordingly to
> Emacs' C-x 8 RET TAB menu, while in Python:
> 
>     >>> import unicodedata
>     >>> unicodedata.name('⋖')
>     'LESS-THAN WITH DOT'
>     >>> print("\N{LESS THAN WITH DOT}")
>       File "<stdin>", line 1
>     SyntaxError: (unicode error) ...: unknown Unicode character name

FWIW, "my" Emacs [1] says:

  Character code properties: customize what to show
    name: LESS-THAN WITH DOT
    old-name: LESS THAN WITH DOT

That means the spelling without the dash seems to be somewhat oldish.

[1] GNU Emacs 25.1.50.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.24.29)
    of 2016-03-07

regards
- -- tomás
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