[Zope] Re: Can I use datetime and timedelta in zope?

5 Sep 2005


      jai alai wrote:
...
Kaixo;
I try to use datetime and timedelta in Zope and
returns a error....
Error Type: ImportError
Error Value: import of "datetime" is unauthorized
I try use datetime and timedelta in an External Method
and returns an error to ....
Error Type: ImportError
Error Value: No module named datetime
There's any way to import this module in Zope or I
must create a new product for it.
Use the DateTime module in Zope. If you need datetime and timedelta, you 
can convert between DateTime and datetime with (untested):


from DateTime import DateTime
from datetime import tzinfo

ZERO = timedelta(0)
HOUR = timedelta(hours=1)
STDOFFSET = timedelta(seconds = -_time.timezone)
if _time.daylight:
     DSTOFFSET = timedelta(seconds = -_time.altzone)
else:
     DSTOFFSET = STDOFFSET
DSTDIFF = DSTOFFSET - STDOFFSET

class LocalTimezone(tzinfo):

     """
     Timezone of the machine where the code is running
     """

     def utcoffset(self, dt):
         if self._isdst(dt):
             return DSTOFFSET
         else:
             return STDOFFSET

     def dst(self, dt):
         if self._isdst(dt):
             return DSTDIFF
         else:
             return ZERO

     def tzname(self, dt):
         return _time.tzname[self._isdst(dt)]

     def _isdst(self, dt):
         tt = (dt.year, dt.month, dt.day,
               dt.hour, dt.minute, dt.second,
               dt.weekday(), 0, -1)
         stamp = _time.mktime(tt)
         tt = _time.localtime(stamp)
         return tt.tm_isdst > 0


def dt2DT(dt):
     "Converts Python datetime to Zope DateTime"
     try:
         # convert dt to local timezone
         ltz = dt.astimezone(LocalTimezone())
         return DateTime(*ltz.timetuple()[:6])
     except:
         return DateTime(dt.year, dt.month, dt.day, 0, 0, 0)


def DT2dt(DT):
     """
     Converts Zope DateTime to Python datetime, Zope DateTime is allways utc
     """
     return datetime.fromtimestamp(DT.timeTime(), LocalTimezone())


-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science