GitHub user zero323 opened a pull request:
https://github.com/apache/spark/pull/16536
[SPARK-19163][PYTHON][SQL][WIP] Delay _judf initialization to the __call__
## What changes were proposed in this pull request?
Defer `UserDefinedFunction._judf` initialization to the first call. This
prevents unintended `SparkSession` initialization.
## How was this patch tested?
TODO
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zero323/spark SPARK-19163
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/16536.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 #16536
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commit 2ca2557f0a31f3007640c12fa3001cc9a868cbb4
Author: zero323 <[email protected]>
Date: 2017-01-07T17:31:36Z
Delay _judf initialization to the __call__
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