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Re: Matplotlib X-axis timezone trouble

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Date Wed, 1 Jul 2015 17:15:38 +1000
Subject Re: Matplotlib X-axis timezone trouble
From Chris Angelico <rosuav@gmail.com>
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On Wed, Jul 1, 2015 at 3:50 PM, Peter Pearson <pkpearson@nowhere.invalid> wrote:
> But look:
>
>     >>> from datetime import datetime
>     >>> import pytz
>     >>> pacific = pytz.timezone("US/Pacific")
>     >>> dt1 = datetime(2006, 11, 21, 16, 30, tzinfo=pacific) # no DST
>     >>> dt2 = datetime(2006, 6, 14, 13, 0, tzinfo=pacific)   # yes DST
>     >>> dt1.dst()
>     datetime.timedelta(0)
>     >>> dt2.dst()
>     datetime.timedelta(0)
>     >>> dt1.utcoffset()
>     datetime.timedelta(-1, 57600)
>     >>> dt2.utcoffset()
>     datetime.timedelta(-1, 57600)
>
> The dst() values are equal, and the utcoffset() values are equal, even
> though one datetime is during DST and the other is not -- exactly the
> opposite of the example.

Just to confirm, they are still showing the times as 16:30 and 13:00, right?

Interestingly, when I tried this (pytz version 2015.4, Python 2.7.9,
Debian Jessie), I saw utcoffset() showing (-1, 58020) for both. That
seems... odd. And I can't fault your dates - those definitely ought to
be easily inside and easily outside the DST boundaries. When I try
those dates in an unrelated time converter, they do show seven- and
eight- hour offsets to UTC. Maybe we're both misunderstanding the
meaning of utcoffset()?

ChrisA

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Thread

Matplotlib X-axis timezone trouble Peter Pearson <pkpearson@nowhere.invalid> - 2015-06-30 00:56 +0000
  Re: Matplotlib X-axis timezone trouble Laura Creighton <lac@openend.se> - 2015-06-30 04:03 +0200
    Re: Matplotlib X-axis timezone trouble Peter Pearson <pkpearson@nowhere.invalid> - 2015-06-30 04:57 +0000
  Re: Matplotlib X-axis timezone trouble Chris Angelico <rosuav@gmail.com> - 2015-06-30 12:11 +1000
    Re: Matplotlib X-axis timezone trouble Peter Pearson <pkpearson@nowhere.invalid> - 2015-06-30 04:49 +0000
      Re: Matplotlib X-axis timezone trouble Chris Angelico <rosuav@gmail.com> - 2015-06-30 17:01 +1000
        Re: Matplotlib X-axis timezone trouble Peter Pearson <pkpearson@nowhere.invalid> - 2015-06-30 16:42 +0000
          Re: Matplotlib X-axis timezone trouble Chris Angelico <rosuav@gmail.com> - 2015-07-01 02:55 +1000
  Re: Matplotlib X-axis timezone trouble Peter Pearson <pkpearson@nowhere.invalid> - 2015-07-01 05:50 +0000
    Re: Matplotlib X-axis timezone trouble Chris Angelico <rosuav@gmail.com> - 2015-07-01 17:15 +1000
      Datetime timezone trouble (was: Matplotlib X-axis timezone trouble) Peter Pearson <pkpearson@nowhere.invalid> - 2015-07-01 16:36 +0000
        Re: Datetime timezone trouble (was: Matplotlib X-axis timezone trouble) Ian Kelly <ian.g.kelly@gmail.com> - 2015-07-01 10:55 -0600
          Re: Datetime timezone trouble (was: Matplotlib X-axis timezone trouble) Peter Pearson <pkpearson@nowhere.invalid> - 2015-07-01 19:09 +0000
        Re: Datetime timezone trouble (was: Matplotlib X-axis timezone trouble) Chris Angelico <rosuav@gmail.com> - 2015-07-02 03:08 +1000
  Re: Matplotlib X-axis timezone trouble Akira Li <4kir4.1i@gmail.com> - 2015-07-04 07:29 +0300
    Re: Matplotlib X-axis timezone trouble [SOLVED] Peter Pearson <pkpearson@nowhere.invalid> - 2015-07-04 17:37 +0000
  Re: Matplotlib X-axis timezone trouble Tony the Tiger <tony@tiger.invalid> - 2015-07-09 19:50 +0000
    Re: Matplotlib X-axis timezone trouble Peter Pearson <pkpearson@nowhere.invalid> - 2015-07-10 16:15 +0000

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