n8n-code-python – skill Lập trình cho agent AI

Python Code Node (Native)

When to Use

Use for bounded Python transformations in an n8n Code node when native nodes or

expressions are insufficient. Check the installed n8n version and task runner first.

Runtime contract

n8n 2 removed the legacy Pyodide runtime. Native Python uses _items in all-items

mode and _item in per-item mode; legacy _input, _json, _node and _now

helpers are unavailable. Self-hosted imports depend on installed runner packages

and explicit allowlists. Cloud imports may be unavailable, including standard

modules. JavaScript imports are restricted too; switching languages does not

provide unrestricted filesystem, networking or package access.

Examples

All-items mode, with no imports:

return [
    {"json": {"id": item["json"].get("id"), "processed": True},
     "pairedItem": {"item": index}}
    for index, item in enumerate(_items)
    if item["json"].get("active")
]

Per-item mode:

return {"json": {**_item["json"], "name_upper": (_item["json"].get("name") or "").upper()}}

Validate actual input types before string operations. Use HTTP Request nodes with

managed credentials for remote calls and enforce allowed destinations. Do not log

payloads/tokens or execute code supplied by webhook users. Keep item count, input

size and runtime bounded; prepare changes in an inactive test workflow before

activating workflows that send messages, spend money or modify external systems.

Detailed Guide

Read [the guide](references/detailed-guide.md) for transformation patterns and

migration caveats. The referenced upstream auxiliary files are not bundled.

Limitations

No workflow or runner is included. Import availability and output normalization

must be checked in the deployed version; item linking, binary data and aggregation

require explicit handling. No runtime tests are established by these examples.

Primary runtime reference: [n8n Code node documentation source](https://github.com/n8n-io/n8n-docs/blob/main/docs/reusable-content/.gitbook/includes/integrations/builtin/core-nodes/code-node.md).