如何在文件更改时自动重新加载Django ?

How to automatically monitor .py, .js and other source code files to restart a Django (or any other for that matter) application and refresh the browser when the source changes? This is possible in Rails using guard, in JS apps using grunt-contrib-watch and the accompanying livereload browser plugin. How can I do it for Python web apps such as Django?How to automatically monitor .py, .js and other