n8n-code-python

To safely write Python in an n8n Code node, use only the standard library without external dependencies, access data via _input references, and enforce a return format of a list containing json keys.

The correct return format for Python in n8n Code nodes is a list of items with a json key, such as [{"json": {...}}]. Enforcing this structure prevents common errors and ensures the workflow processes the data correctly.

To access webhook payload data using Python in n8n, you must retrieve it from the body by referencing _json['body']. This adheres to the required webhook data structure and ensures safe payload handling within the Code node.

No, you cannot use external Python libraries in n8n Code nodes. The environment is restricted to the standard library only, meaning you must write production-quality code using built-in modules and avoid external package dependencies.

You should choose Python versus JavaScript in n8n Code nodes based on language limitations and data access patterns. Python is viable for standard library tasks, while JavaScript may be preferable for broader ecosystem compatibility within n8n workflows.

Your Python Code node in n8n throws a KeyError or IndexError due to incorrect data access patterns. To fix this, ensure you safely pull data using _input.all() or _input.first() and validate structures before returning data in the required [{json}] format.