# pytest-dev__pytest-11143

> Based on the error traceback in the issue, I can see the problem. The issue is at line 760 in _pytest/assertion/rewrite.py:

- Source: https://doutorai.pt/en/components/skills__pytest-dev-pytest-11143
- Type: Skills
- Category: AI research
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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.

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## Install (Claude Code)

```bash
mkdir -p .claude/skills/pytest-dev-pytest-11143 && curl -fsSL https://doutorai.pt/data/lib/skills__pytest-dev-pytest-11143.md -o .claude/skills/pytest-dev-pytest-11143/SKILL.md
```

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

## Content

````
Based on the error traceback in the issue, I can see the problem. The issue is at line 760 in `_pytest/assertion/rewrite.py`:

```python
return "PYTEST_DONT_REWRITE" in docstring
```

The problem is that when the first expression in a Python file is a number (like `0`), it's being mistakenly treated as a docstring. When you try to use `in` operator on an integer, Python raises `TypeError: argument of type 'int' is not iterable`.

The fix needs to check if the docstring is actually a string before checking if it contains `"PYTEST_DONT_REWRITE"`.

Looking at the traceback:
- Line 695: `if self.i

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````

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