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[hotfix][python][docs] add bundling udfs section #15790

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[hotfix][python][docs] add bundling udfs section #15790

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4 changes: 4 additions & 0 deletions docs/content/docs/dev/python/table/udfs/python_udfs.md
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Expand Up @@ -30,6 +30,10 @@ User-defined functions are important features, because they significantly extend

**NOTE:** Python UDF execution requires Python version (3.6, 3.7 or 3.8) with PyFlink installed. It's required on both the client side and the cluster side.

## Bundling UDFs

**NOTE:** To run Python UDFs (as well as Pandas UDF) in any non-local mode, it is strongly recommended to bundle your UDF definitions using the config option [`python-files`]({{< ref "docs/dev/python/python_config" >}}#python-files), if your UDFs live outside of the file where the `main()` function is defined. Otherwise, you may run into `ModuleNotFoundError: No module named 'my_udf'` if you define UDFs in a file called `my_udf.py`.

## Scalar Functions

It supports to use Python scalar functions in Python Table API programs. In order to define a Python scalar function,
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