# 错误：Cython 似乎未安装。使用 'pip install Cython' 安装它。

- **ID:** `python/setuptools-cython-extension-error`
- **领域:** python
- **类别:** install_error
- **验证级别:** ai_generated
- **修复率:** 80%

## 根因

setup.py 使用了 Cython 扩展，但环境中未安装 Cython。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| 3.8 | active | — | — |
| 3.9 | active | — | — |
| 3.10 | active | — | — |
| 3.11 | active | — | — |
| 3.12 | active | — | — |

## 解决方案

1. **** (95% 成功率)
   ```
   pip install Cython
   ```
2. **** (90% 成功率)
   ```
   [build-system] requires = ['setuptools', 'wheel', 'Cython']
   ```

## 无效尝试

- **** — Global install may not be accessible in virtual environments; also may cause version conflicts. (40% 失败率)
- **** — Setuptools does not include Cython; it must be explicitly installed. (70% 失败率)