Converting Excel time-format (hours since 1.1.1901)

[Dirk Hagemann]

On 7 Dez., 14:34, supercooper <supercoo... at gmail.com> wrote:
> On Dec 7, 7:20 am, Dirk Hagemann <DirkHagem... at gmail.com> wrote:
>
>
>
> > Hello,
>
> > From a zone-file of a Microsoft Active Directory integrated DNS server
> > I get the date/time of the dynamic update entries in a format, which
> > is as far as I know the hours since january 1st 1901.
> > For Example: the number 3566839 is 27.11.07 7:00. To calculate this in
> > Excel I use this:
> > ="01.01.1901"+(A1/24-(REST(A1;24)/24))+ZEIT(REST(A1;24);0;0)  (put
> > 3566839 in field A1 and switch the format of the result-field to the
> > corresponding date-time format).
>
> > You might guess what I need now: I want to calculate this somehow in
> > python.
>
> > Sorry, but I couldn't find anything in the module time or something
> > else to get this calculated.
>
> > Does anyone know how to convert this time in python to something
> > usable or how to convert this formula in python?
>
> > Thanks a lot and regards
> > Dirk
>
> I think you want the xldate_as_tuple function in the xlrd module:
>
> http://www.lexicon.net/sjmachin/xlrd.htm
>
> It works like a champ for me:
>
> >>> import xlrd
> >>> xlrd.xldate.xldate_as_tuple(38980,0)
>
> (2006, 9, 20, 0, 0, 0)
>
>
>
> chad!

Thanks so far, that comes close to a solution I think, BUT when I
enter 3566985 instead of 38980 I get the following error:
Traceback (most recent call last):
  File "test.py", line 20, in <module>
    print xlrd.xldate.xldate_as_tuple(3566985,0)
  File "C:\Python25\lib\site-packages\xlrd\xldate.py", line 75, in
xldate_as_tuple
    raise XLDateTooLarge(xldate)
xlrd.xldate.XLDateTooLarge: 3566985

Do I have to use another function of this module? My number is 2
digits shorter than yours. What is 38980 representing?

Dirk