When I tried to convert a datetime object into timestamp and convert it back the result if off by 53 minutes.

timestamp = datetime.datetime(2022, 5, 3, 18, 0, 0, 0, tzinfo=pytz.timezone('US/Pacific')).timestamp()
# timetamp = 1651629180
datetime.datetime.fromtimestamp(timestamp, tz=pytz.timezone('US/Pacific'))
# formmated_timestamp = datetime.datetime(2022, 5, 3, 18, 53, tzinfo=<DstTzInfo 'US/Pacific' PDT-1 day, 17:00:00 DST>)

somehow the result is off by 53 minutes. This is true for all other values as well The issue seems to be at the .timestamp() part

CodePudding user response：

From the pytz docs:

This library only supports two ways of building a localized time. The first is to use the localize() method provided by the pytz library. This is used to localize a naive datetime (datetime with no timezone information):

>>> loc_dt = eastern.localize(datetime(2002, 10, 27, 6, 0, 0))
>>> print(loc_dt.strftime(fmt))
2002-10-27 06:00:00 EST-0500

The second way of building a localized time is by converting an existing localized time using the standard astimezone() method:

>>> ams_dt = loc_dt.astimezone(amsterdam)
>>> ams_dt.strftime(fmt)
'2002-10-27 12:00:00 CET 0100'

Unfortunately using the tzinfo argument of the standard datetime constructors ''does not work'' with pytz for many timezones.

>>> datetime(2002, 10, 27, 12, 0, 0, tzinfo=amsterdam).strftime(fmt)
'2002-10-27 12:00:00 LMT 0020'