This plugin contains nodes that integrate Python (version 2 or 3) into KNIME. The library to use for transferring data between KNIME and Python can be chosen in the preferences. The scripts require a local Python installation (not included).
Extension 
KNIME Python Integration
Included nodes & related workflows
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Update site information
KNIME Analytics Platform 4.4 Update Site, Version 4.4.0
http://update.knime.com/analytics-platform/4.4
In case you can’t install the extension via drag & drop, please check that the update site is activated.