GitHub user BryanCutler opened a pull request:
https://github.com/apache/spark/pull/20892
[SPARK-23700][PYTHON] Cleanup imports in pyspark.sql
## What changes were proposed in this pull request?
This cleans up unused imports, mainly from pyspark.sql module. Added a
note in function.py that imports `UserDefinedFunction` only to maintain
backwards compatibility for using `from pyspark.sql.function import
UserDefinedFunction`.
## How was this patch tested?
Existing tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/BryanCutler/spark
pyspark-cleanup-imports-SPARK-23700
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/20892.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 #20892
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commit 5da8c3d39cbbe8e78df2fad4c04d7a7ab1d9db9d
Author: Bryan Cutler <cutlerb@...>
Date: 2018-03-22T00:09:01Z
tests passing
commit 5214f411d28a19b244a97ffe25f8be5852e273c1
Author: Bryan Cutler <cutlerb@...>
Date: 2018-03-23T18:25:28Z
change note description
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