On 08/24/2015 10:16 AM, Alexander Belopolsky wrote:> PEP 495 takes a different
approach:
>>> from test.datetimetester import Eastern2
>>> datetime(2004, 4, 4, 2, first=True,
tzinfo=Eastern2).astimezone().isoformat()
'2004-04-04T03:00:00-04:00'
>>> datetime(2004, 4, 4, 2, first=False,
tzinfo=Eastern2).astimezone().isoformat()
'2004-04-04T01:00:00-05:00'
A post-PEP 495 timezone conversion faced with a missing time is required to
return
a valid time. This is similar to the way C mktime works in most
implementations.
If you give it a struct tm representing a time from a DST gap - it will
"normalize"
it by changing tm_hour up or down depending on the tm_isdst value.
I would be much happier about this if:
>>> datetime(2004, 4, 4, 2, first=None,
tzinfo=Eastern2).astimezone().isoformat()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File ".../pytz/tzinfo.py", line 327, in localize
raise NonExistentTimeError(dt)
NonExistentTimeError: 2004-04-04 02:00:00
Giving the programmer an easier option to use if they want an exception.
--
~Ethan~
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