Philip Kahn created SPARK-39142:
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Summary: Type overloads in `pandas_udf`
Key: SPARK-39142
URL: https://issues.apache.org/jira/browse/SPARK-39142
Project: Spark
Issue Type: Bug
Components: PySpark
Affects Versions: 3.2.1
Reporter: Philip Kahn
It seems that the `returnType` in the type overloads for `pandas_udf` never
specify a generic for PySpark SQL types or explicitly list those types:
[https://github.com/apache/spark/blob/f84018a4810867afa84658fec76494aaae6d57fc/python/pyspark/sql/pandas/functions.pyi]
This results in static type checkers flagging the type of the decorated
functions (and their parameters) as incorrect, see
[https://github.com/microsoft/pylance-release/issues/2789] as an example.
For someone familiar with the code base, this should be a very fast patch.
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