n8n-code-python

External Python libraries cannot be used in n8n Code nodes. Python execution is restricted to the standard library only, so you must rely on built-in modules for data transformation and apply safe practices like .get() for dictionary access.

Webhook payloads in an n8n Python Code node are accessed under the _json['body'] structure. You extract incoming data from this dictionary, apply your standard library transformations, and ensure the output is formatted as a list of objects with a json key.

The correct return format for n8n Python Code nodes is a list of objects, where each object contains a json key. Maintaining this return-format discipline ensures downstream nodes can properly consume the transformed data items.

JavaScript is preferred over Python for HTTP calls and advanced data tasks in n8n. Because Python is limited to the standard library, complex network requests or advanced integrations are better handled using JavaScript within the Code node.

To process multiple items in an n8n Python Code node, use batch processing with _input.all() for All Items mode, or handle records individually with _input.item for Each Item mode. Both methods allow safe data transformation using standard library modules.