[egenix-users] Roundoff problem in DateTime

[M.-A. Lemburg]

Reggie Dugard wrote:
> Sorry about that last e-mail, I included the attributes of the DateTime
> instance BEFORE doing the addition (too little sleep I guess).  Here are
> the ones you asked for.

Thanks. I can reproduce the problem now.

I'll see whether I can find a fix for it. The problem is that
leap seconds show as .abstime == 86400.0 as well, so whether
or not a value is invalid is not straight forward to decide.

> On Mon, 2002-07-08 at 11:36, Reggie Dugard wrote:
> 
>>I downloaded and compiled the beta 2 version of 2.1.0 and unfortunately
>>it didn't help.  I've printed out all the attributes below, as you
>>requested.
>>
>>Let me know if you need anything else.
>>
>>Reggie
>>
>>
>>Python 2.2.1 (#1, Apr 29 2002, 15:21:53) 
>>[GCC 3.0.3] on linux2
>>Type "help", "copyright", "credits" or "license" for more information.
>>
>>>>>import mx.DateTime
>>>>>mx.DateTime.__version__
>>>>
>>'2.1.0'
>>
>>>>>t = mx.DateTime.DateTimeFromAbsDateTime(730488,81317.647058823524)
>>>>>t
>>>>
>><DateTime object for '2001-01-03 22:35:17.65' at 8134e58>
> 
> 
>>>>t += 1.0/17.0
>>>>t
>>>
> <DateTime object for '2001-01-03 24:00:00.00' at 818b088>
> 
>>>>for attr in t.__members__:
>>>
> ...     print attr, ':', getattr(t,attr)
> ... 
> year : 2001
> month : 1
> day : 3
> hour : 24
> minute : 0
> second : 0.0
> absdays : 730488.0
> absdate : 730488
> abstime : 86400.0
> yearoffset : 730485
> is_leapyear : 0
> day_of_week : 2
> day_of_year : 3
> days_in_month : 31
> tz : PST
> dst : 0
> iso_week : (2001, 1, 3)
> mjd : 51913.0
> tjd : 1913.0
> tjd_myriad : 245
> jdn : 2451913.5
> calendar : Gregorian

-- 
Marc-Andre Lemburg
CEO eGenix.com Software GmbH
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