GitHub user ueshin opened a pull request:
https://github.com/apache/spark/pull/20559
[WIP][SPARK-23360][SQL][PYTHON] Get local timezone from environment vi
pytz, or dateutil.
## What changes were proposed in this pull request?
Currently we use `tzlocal()` to get Python local timezone, but it sometimes
causes unexpected behavior.
I changed the way to get Python local timezone to use pytz if the timezone
is specified in environment variable, or timezone file via dateutil .
## How was this patch tested?
Modified some tests and existing tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/ueshin/apache-spark issues/SPARK-23360/master
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/20559.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #20559
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commit e87bd7639e546e24be1bf7a781ccd1571ad71964
Author: Takuya UESHIN <ueshin@...>
Date: 2018-02-09T13:43:44Z
Get local timezone from environment vi pytz, or dateutil.
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