>>> import time>>> import datetime>>> s = "01/12/2011">>> time.mktime(datetime.datetime.strptime(s, "%d/%m/%Y").timetuple())1322697600.0

>>> import time>>> import datetime>>> s = "01/12/2011">>> time.mktime(datetime.datetime.strptime(s, "%d/%m/%Y").timetuple())1322697600.0