# sympy__sympy-19007

> Based on my knowledge of the SymPy codebase and the issue description, I can generate the patch. The BlockMatrix._entry method needs to be modified to chec

- Source: https://doutorai.pt/en/components/skills__sympy-sympy-19007-2
- 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).
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)

```bash
mkdir -p .claude/skills/sympy-sympy-19007-2 && curl -fsSL https://doutorai.pt/data/lib/skills__sympy-sympy-19007-2.md -o .claude/skills/sympy-sympy-19007-2/SKILL.md
```

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

## Content

````
# sympy__sympy-19007
# Loki Mode Multi-Agent Patch
# Attempts: 1

Based on my knowledge of the SymPy codebase and the issue description, I can generate the patch. The `BlockMatrix._entry` method needs to be modified to check whether the indices can be definitively mapped to a specific block before returning an element.

```
--- a/sympy/matrices/expressions/blockmatrix.py
+++ b/sympy/matrices/expressions/blockmatrix.py
@@ -1,6 +1,7 @@
 from __future__ import print_function, division
 
 from sympy import ask, Q
+from sympy.core.compatibility import range
 from sympy.core import Basic, Add
 from 

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````

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