在Python中，如何有效地管理脚本文件之间的引用？

I have a fair number of Python scripts that contain reusable code that are used and referenced by other Python scripts. However, these scripts tend to be scattered across different directories and I find it to be somewhat tedious to have to include (most often multiple) calls to sys.path.append on my top-level scripts. I just want to provide the 'import' statements without the additional file references in the same script.I have a fair number of Python scripts that con