from datetime import datetime
import time
import calendar

start='2012-11-05 00:00:00'   #UTC time
tt=datetime.strptime(start, '%Y-%m-%d %H:%M:%S')
print tt
# convert to unix-time
unixtime=int(time.mktime(tt.timetuple()))
print unixtime

import datetime
now1=datetime.datetime.fromtimestamp(unixtime)
print now1

#--------------------------------------
print "--------convertion to UTC time-------- "
# Start='2012-11-04 00:00:00'   #UTC time
#End  ='2012-11-04 09:00:00'   #UTC time
from datetime import datetime
import time
Start='2012-11-04 00:00:00'   #UTC time
End  ='2012-11-04 09:00:00'   #UTC time
tStart=datetime.strptime(Start, '%Y-%m-%d %H:%M:%S')
tEnd  =datetime.strptime(End  , '%Y-%m-%d %H:%M:%S')
# convert to unix-time
Startunixtime=int(time.mktime(tStart.timetuple()))
Startunixtime1=int(calendar.timegm(tStart.timetuple()))
# noted that Japan time, 9hr diff automatically build-in
Endunixtime  =int(time.mktime(tEnd.timetuple()))
print "Start Tokyo", Start, Startunixtime
print "Start UTC  ", Start, Startunixtime1
print "End Tokyo  ", End  , Endunixtime
nanosec="000000000"
iovStart="%s%s" %(Startunixtime,nanosec)
iovEnd  ="%s%s" %(Endunixtime,nanosec)
print iovStart
print iovEnd
iovString= "%s-%s"%(iovStart,iovEnd)
print iovString

=======================================================
$ python date3.py
2012-11-05 00:00:00
1352041200
2012-11-05 00:00:00
--------convertion to UTC time--------
Start Tokyo 2012-11-04 00:00:00 1351954800
Start UTC   2012-11-04 00:00:00 1351987200
End Tokyo   2012-11-04 09:00:00 1351987200
1351954800000000000
1351987200000000000
1351954800000000000-1351987200000000000

kondo@kondo-PC ~/python
$ vi date3.py

kondo@kondo-PC ~/python
$ python date3.py
2012-11-05 00:00:00
1352041200
2012-11-05 00:00:00
--------convertion to UTC time--------
Start Tokyo 2012-11-04 00:00:00 1351954800
Start UTC   2012-11-04 00:00:00 1351987200
End Tokyo   2012-11-04 09:00:00 1351987200
1351954800000000000
1351987200000000000
1351954800000000000-1351987200000000000