In This Package:

TimeStampExt.py

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"""
  TimeStamp and datetime integration ...

  TODO:
     add similar at C++ level ... allowing 
      TimeStamp.kNow

"""
from GaudiPython import gbl
TimeStamp = gbl.TimeStamp 
TimeStamp.__repr__ = TimeStamp.AsString

from datetime import tzinfo, timedelta, datetime
ZERO = timedelta(0)

class UTC(tzinfo):
    def utcoffset(self, dt):
        return ZERO
    def tzname(self, dt):
        return "UTC"
    def dst(self, dt):
        return ZERO

utc = UTC()
t0 = datetime.fromtimestamp( 0 , utc )   # start of the epoch 

def fromUTCDatetime( cls, t ):
    dt = t - t0
    return TimeStamp( dt.seconds + dt.days * 24 * 3600 )
TimeStamp.fromUTCDatetime = classmethod( fromUTCDatetime ) 

def kNow( cls ):
    t = datetime.utcnow().replace(tzinfo=utc) 
    return TimeStamp.fromUTCDatetime( t )  
TimeStamp.kNow = classmethod( kNow )

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