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To: python-list@python.org
From: Terry Reedy <tjreedy@udel.edu>
Subject: Re: utcoffset v. _utcoffset
Date: Wed, 21 Aug 2013 16:25:10 -0400
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On 8/21/2013 2:05 PM, Skip Montanaro wrote:
> Consider this little Python script:
>
> import dateutil.parser
> import pytz

Neither of these are stdlib modules, so I cannot run this.

> x = dateutil.parser.parse("2013-08-16 23:00:00+01:00")
> localtz = pytz.timezone("America/Chicago")
> y = localtz.normalize(x)
>
> When I execute it (Python 2.7.2, dateutil 1.5, pytz 2011h), I get this
> traceback:
>
> Traceback (most recent call last):
>    File "/home/skipm/tmp/localtzex.py", line 8, in <module>
>      y = localtz.normalize(x)
>    File "/opt/TWWfsw/python27p/lib/python2.7/site-packages/pytz/tzinfo.py",
> line 233, in normalize
>      offset = dt.tzinfo._utcoffset
> AttributeError: 'tzoffset' object has no attribute '_utcoffset'
>
> Looking at the tzinfo attribute, I see that it has "utcoffset", but
> not "_utcoffset".  I realize those are the latest, most up-to-datest
> versions of all three elements.  I'm having trouble updating dateutil
> and pytz on my Mac at home (stuck on even older versions).  Can
> someone with newer versions of dateutil and pytz see if this problem
> is still present?

-- 
Terry Jan Reedy