Unsuccessful Installation

ERROR: bleach 1.5.0 has requirement html5lib!=0.9999,!=0.99999,<0.99999999,>=0.999, but you'll have html5lib 1.0b8 which is incompatible.

ERROR: Cannot uninstall 'tornado'. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall.

首先根据 quickstart 重现安装过程，并检查其中的设置说明，确认错误中显示的 Python 依赖版本。确定 bleach/html5lib 冲突和通过 distutils 安装的 tornado 失败是否仍可重现；完成的标准是验证出一条不会出现这些错误的安装路径。

由索引模型根据 Issue 内容生成。