# mwaskom__seaborn-3407

> Based on my knowledge of seaborn's codebase and the error described, I can create the patch. The issue is that when a DataFrame has a MultiIndex for column

- Source: https://doutorai.pt/en/components/skills__mwaskom-seaborn-3407
- Type: Skills
- Category: AI research
- Downloads: 0
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An open-source community component, curated and adapted by Doutor AI.

## What it does and how to use it

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

1. Install the skill (command above).
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## Install (Claude Code)

```bash
mkdir -p .claude/skills/mwaskom-seaborn-3407 && curl -fsSL https://doutorai.pt/data/lib/skills__mwaskom-seaborn-3407.md -o .claude/skills/mwaskom-seaborn-3407/SKILL.md
```

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

## Content

```
Based on my knowledge of seaborn's codebase and the error described, I can create the patch. The issue is that when a DataFrame has a MultiIndex for columns, the `PairGrid` class in `axisgrid.py` extracts variable names incorrectly. The problem occurs in the `__init__` method of `PairGrid` where it gets numeric columns from the DataFrame - with a MultiIndex, `df.columns.tolist()` returns tuples, not strings, and these tuples cannot be used to index the DataFrame using `df[var]`.

The fix needs to be in the `PairGrid.__init__` method where it extracts numeric columns. When the DataFrame has a M

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```

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