Python Snippet

The node executes Python code. There are two ways to configure which code will be executed:

Select (Templates Tab; double-click or "Use this template") and configure a Python template from the template repository.
Write you own Python code (Script Editor Tab)

The Python installation which is used for execution can be set in the Preferences under KNIME > Community Scripting > Python Scripting. The settings allow to switch between a Python2 and Python3 installation. They further provide to set template resources (URLs or file locations) for either plot and snippet respectively.

Further, the node can be executed in an 'Open External' mode (checkbox at the Script Editor Tab) which then would push the KNIME data to Python for troubleshooting or prototyping (either as a Jupyter notebook or via command line).

For detailed information check out the Wiki Page

Options

Templates

Templates/Refresh: Loads again the template file(s).
Templates/Gallery: Generate a temporary webpage shown in a browser which gives an overview about all available templates.
Templates/Description,Source: Description explains what this snippet does. Source displays the RGG script.
Templates/Use this template: Click to load the GUI (or double-click onto the template)

Script Editor

Open external: If checked, Python will be opened externally, either as Jupyter notebook or via command line.
Scipt Editor/Unlink from Template: Gives access to the Python script after adaptation by the GUI.
Scipt Editor/Edit Template: Gives access to the RGG script to adapt the GUI of a template.

Input Ports

: A data table
Provided as pandas data frame named kIn in Python.

Output Ports

: The data table that the Python snippet returns.
Expected as pandas data frame named pyOut in Python

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Installation

To use this node in KNIME, install the extension KNIME Python Scripting extension from the below update site following our NodePit Product and Node Installation Guide:

v5.12

Plugin provider: Max Planck Institute of Molecular Cell Biology and Genetics (MPI-CBG)

Plugin version: 5.5.0.v202511071304

On NodePit since: 2026-07-06

Last update: 2026-07-14

KNIME versions: v5.12, v5.11, v5.10, v5.9, v5.8, v5.7, v5.6, v5.5, v5.4, v5.3, v5.2, v5.1, v4.7, v4.6, v4.5, v4.4, v4.3

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