[perl-python] unicode study with unicodedata module

Discussion in 'Perl Misc' started by Xah Lee, Mar 15, 2005.

  1. Xah Lee

    Xah Lee Guest

    python has this nice unicodedata module that deals with unicode nicely.

    #-*- coding: utf-8 -*-
    # python

    from unicodedata import *

    # each unicode char has a unique name.
    # one can use the “lookup†func to find it

    mychar=lookup('greek cApital letter sIgma')
    # note letter case doesn't matter
    print mychar.encode('utf-8')

    m=lookup('CJK UNIFIED IDEOGRAPH-5929')
    # for some reason, case must be right here.
    print m.encode('utf-8')

    # to find a char's name, use the “name†function
    print name(u'天')

    basically, in unicode, each char has a number of attributes (called
    properties) besides its name. These attributes provides necessary info
    to form letters, words, or processing such as sorting, capitalization,
    etc, of varous human scripts. For example, Latin alphabets has two
    forms of upper case and lower case. Korean alphabets are stacked
    together. While many symbols corresponds to numbers, and there are also

    combining forms used for example to put a bar over any letter or
    character. Also some writings systems are directional. In order to form

    these symbols for display or process them for computing, info of these
    on each char is necessary.

    the rest of functions in unicodedata return these attributes.

    see unicodedata doc:
    http://python.org/doc/2.4/lib/module-unicodedata.html

    Official word on unicode character properties:
    http://www.unicode.org/uni2book/ch04.pdf

    --
    i don't know what's the state of Perl's unicode. Is there something
    similar?

    --
    this post is archived at
    http://xahlee.org/perl-python/unicodedata_module.html

    Xah

    http://xahlee.org/PageTwo_dir/more.html
    Xah Lee, Mar 15, 2005
    #1
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  2. Xah Lee wrote:

    > i don't know what's the state of Perl's unicode.


    perldoc perlunicode
    Brian McCauley, Mar 15, 2005
    #2
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  3. Xah Lee

    Xah Lee Guest

    Re: unicode study with unicodedata module

    here's a snippet of code that prints a range of unicode chars, along
    with their ordinal in hex, and name.

    chars without a name are skipped. (some of such are undefined code
    points.)

    On Microsoft Windows the encoding might need to be changed to utf-16.

    Change the range to see different unicode chars.

    # -*- coding: utf-8 -*-

    from unicodedata import *

    l=[]
    for i in range(0x0000, 0x0fff):
    l.append(eval('u"\\u%04x"' % i))

    for x in l:
    if name(x,'-')!='-':
    print x.encode('utf-8'),'|', "%04x"%(ord(x)), '|', name(x,'-')
    --
    http://xahlee.org/perl-python/unicodedata_module.html

    anyone wants to supply a Perl version?

    Xah

    http://xahlee.org/PageTwo_dir/more.html



    Brian McCauley wrote:
    > Xah Lee wrote:
    >
    > > i don't know what's the state of Perl's unicode.

    >
    > perldoc perlunicode
    Xah Lee, Mar 16, 2005
    #3
  4. Xah Lee

    Xah Lee Guest

    Xah Lee, Mar 16, 2005
    #4
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