[New-bugs-announce] [issue6383] error in unicodedata.numeric(u"\u2187") and 2188

[Vernon Cole]

New submission from Vernon Cole <vernondcole at gmail.com>:

I am making a demo program, a class which is a subset of int, which
implements a partial implementation of PEP313 (Roman numeral literals).

I discover that my conversion routines fail for values > 50000 due to an
error in unicodedata for the two code points 2187 and 2188. The return
value of unicodedata.numeric() for those two points should be 50,000.0
and 100,000.0 respectively. See the following console dump which
includes code point 2181 which works correctly.

----- console dump follows -----

c:\BZR\roman>c:\python26\python.exe
Python 2.6.2 (r262:71605, Apr 14 2009, 22:40:02) [MSC v.1500 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import unicodedata
>>> unicodedata.name(u"\u2187")
'ROMAN NUMERAL FIFTY THOUSAND'
>>> unicodedata.numeric(u"\u2187")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: not a numeric character
>>> unicodedata.name(u"\u2188")
'ROMAN NUMERAL ONE HUNDRED THOUSAND'
>>> unicodedata.numeric(u"\u2188")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: not a numeric character
>>> unicodedata.name(u"\u2181")
'ROMAN NUMERAL FIVE THOUSAND'
>>> unicodedata.numeric(u"\u2181")
5000.0
>>>

----------
components: Unicode
messages: 89899
nosy: vernondcole
severity: normal
status: open
title: error in unicodedata.numeric(u"\u2187") and 2188
type: behavior
versions: Python 2.6

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<http://bugs.python.org/issue6383>
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