import 来源

https://blog.csdn.net/lanchunhui/article/details/70160039

>> import iva

>> iva.__file__

'/usr/local/lib/python2.7/dist-packages/iva/__init__.pyc'

 

 

https://blog.csdn.net/u012422440/article/details/41791433   "python 标准链接库目录"

 

模块搜索路径：

                  *程序主目录

                  *PYTHONPATH目录

                  *标准链接库目录

                  *.pth文件目录

 

原理介绍 http://www.itopers.com/article/201