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07_​Python_​Script_​example

Python Script example with new Python API backend

This workflow uses the new Python Script node. This node features a new backend that makes execution of Python scripts as fast in KNIME as it is anywhere else.

Random data is generated by using the Data Generator node and a flow variable is created via the Variable Creator node. The flow variable and the generated data are injected to the Python Script node.

Open the configuration dialog of the Python Script node to write the Python code.

Here a function is applied to the column of the input data table indicated by the flow variable. The transformed data table is available at the output port of the Python Script node.

This workflow is configured to run with the Columnar backend.

URL: KNIME Workbench Guide - Columnar backend https://docs.knime.com/latest/analytics_platform_workbench_guide/index.html#table-backend
URL: KNIME Python Integration Guide https://docs.knime.com/latest/python_installation_guide/index.html#python-script-labs

Python Script example with new Python API backend In this workflow the new Python Script node is used. The Python script transforms one column of the input data table, determined by a flow variable, by applying a pow function to it. It writes the result in the output table.
create random data
Data Generator
create a flow variable
Variable Creator
In: random data, flow variable Python script: Apply function to column Out: processed data table
Python Script (Labs)

Nodes

Extensions

Links

Download

To use this workflow in KNIME, download it from the below URL and open it in KNIME:

Download Workflow
Created by: dirk
Created at: 2021-12-01
On NodePit since: 2025-12-17
Last update: 2026-01-06
Created with KNIME version: v5.9.0
Tags: PythonScriptingColumnar backend

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