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DATA_ACCESS

Complete guide to accessing data in n8n Code nodes using Python.

  • Skills
  • Workflow Automation
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What it does and how to use it

A skill that teaches Claude Code to do workflow automation tasks well. It is packaged knowledge the model uses whenever it is relevant.

  1. Install the skill (command above).
  2. In Claude Code, describe what you need - the skill turns on by itself when the context fits.
  3. No commands to memorize: you talk in plain language and the skill does the rest.

Install (Claude Code)

mkdir -p .claude/skills/data-access && curl -fsSL https://doutorai.pt/data/lib/skills__data-access.md -o .claude/skills/data-access/SKILL.md

Paste this command into the terminal, in your project folder, and the component installs automatically.

Content

# Data Access Patterns - Python Code Node

Complete guide to accessing data in n8n Code nodes using Python.

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## Overview

In n8n Python Code nodes, you access data using **underscore-prefixed** variables: `_input`, `_json`, `_node`.

**Data Access Priority** (by common usage):
1. **`_input.all()`** - Most common - Batch operations, aggregations
2. **`_input.first()`** - Very common - Single item operations
3. **`_input.item`** - Common - Each Item mode only
4. **`_node["NodeName"]["json"]`** - Specific node references
5. **`_json`** - Direct current item (use `_input` instead)

**Python v

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