[Answered ]-Time and Datetime differences in python trigger error

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You are getting confused between local time (as returned by datetime.now() and GMT (as parsed by calendar.timegm()):

>>> t = datetime.now().strftime('%Y%m%dT%H%M%SZ')
>>> t
'20120910T232358Z'
>>> calendar.timegm(time.strptime(t, "%Y%m%dT%H%M%SZ"))
1347319438
>>> time.mktime(time.localtime())
1347312258.0
>>> time.mktime(time.strptime(t, "%Y%m%dT%H%M%SZ"))
1347312238.0

Conclusion: use time.mktime instead of calendar.timegm to turn your values to timestamps.

👤Martijn Pieters

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