> For the complete documentation index, see [llms.txt](https://xgn.gitbook.io/hhsoj-essential-doc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://xgn.gitbook.io/hhsoj-essential-doc/building/judger-building/installing-lo-runner.md).

# Installing Lo-runner

The Python judge core needs Lo-runner to be run.

Download the Lo-run source code at [Github](https://github.com/dojiong/Lo-runner).And make sure you have Python and GNU C Compiler installed

Run in command line:

```
python setup.py install
```

You are set!