HyukjinKwon aa6a60530e [SPARK-30722][PYTHON][DOCS] Update documentation for Pandas UDF with Python type hints ... ### What changes were proposed in this pull request? This PR targets to document the Pandas UDF redesign with type hints introduced at SPARK-28264. Mostly self-describing; however, there are few things to note for reviewers. 1. This PR replace the existing documentation of pandas UDFs to the newer redesign to promote the Python type hints. I added some words that Spark 3.0 still keeps the compatibility though. 2. This PR proposes to name non-pandas UDFs as "Pandas Function API" 3. SCALAR_ITER become two separate sections to reduce confusion: - `Iterator[pd.Series]` -> `Iterator[pd.Series]` - `Iterator[Tuple[pd.Series, ...]]` -> `Iterator[pd.Series]` 4. I removed some examples that look overkill to me. 5. I also removed some information in the doc, that seems duplicating or too much. ### Why are the changes needed? To document new redesign in pandas UDF. ### Does this PR introduce any user-facing change? No. ### How was this patch tested? Existing tests should cover. Closes #27466 from HyukjinKwon/SPARK-30722. Authored-by: HyukjinKwon <gurwls223@apache.org> Signed-off-by: HyukjinKwon <gurwls223@apache.org>		2020-02-12 10:49:46 +09:00
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src/main	[SPARK-30722][PYTHON][DOCS] Update documentation for Pandas UDF with Python type hints	2020-02-12 10:49:46 +09:00
pom.xml	[INFRA] Reverts commit 56dcd79 and c216ef1	2019-12-16 19:57:44 -07:00