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import datetime
datetime_string_fmt = '%Y-%m-%d %H:%M:%S.%f'
def to_lumi_time( runNumber, lumiSectionId ):
return (runNumber<<32) + lumiSectionId
def from_lumi_time( lumiTime ):
run = lumiTime>>32
lumisection_id = lumiTime-( run << 32 )
return run, lumisection_id
def to_timestamp( dt ):
timespan_from_epoch = dt - datetime.datetime(1970,1,1)
seconds_from_epoch = int( timespan_from_epoch.total_seconds() )
nanoseconds_from_epoch = timespan_from_epoch.microseconds * 1000
return ( seconds_from_epoch << 32 ) + nanoseconds_from_epoch
def from_timestamp( ts ):
seconds_from_epoch = ts >> 32
nanoseconds_from_epoch = ts - ( seconds_from_epoch << 32 )
dt = datetime.datetime.utcfromtimestamp(seconds_from_epoch)
return dt + datetime.timedelta( microseconds=int(nanoseconds_from_epoch/1000) )
def string_to_timestamp( sdt ):
dt = datetime.datetime.strptime( sdt, datetime_string_fmt )
return to_timestamp( dt )
def string_from_timestamp( ts ):
dt = from_timestamp( ts )
return dt.strftime( datetime_string_fmt )
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