n8n-code-python

Python in n8n Code nodes is constrained to the standard library, meaning you can only use built-in modules like json, datetime, re, base64, hashlib, and urllib.parse. You must also follow specific data access patterns and return properly formatted json-wrapped output arrays.

Input data in n8n Python Code nodes is accessed via _input.all() for all items, _input.first() for the first item, or _input.item for the current item. Webhook data requires safely handling the _json["body"] structure to prevent KeyError.

The correct return format for n8n Python Code nodes is an array of {'json': ...} objects. Returning results in this json-wrapped array format ensures the output successfully passes to downstream nodes across both All Items and Each Item modes.

Preventing KeyError and IndexError in n8n Python scripts requires defensive programming when accessing data structures. Safe handling of webhook data under ["body"] and careful item access prevents common runtime errors within the no-external-libraries constraint.

The n8n Python Code node does not support third-party packages due to a strict no-external-libraries constraint. You must rely on standard library modules like json, datetime, re, base64, hashlib, and urllib.parse to execute data transformations.