理解site，site-packages in Python

• site module

  document source code

  site.py as a module is automatically imported during initialization.

  The automatic import can be supressed using the interpreter’s -S option.

  Importing this module will append site-specific paths to the module search path and add a few builtins.

• site-packages

  There are two types of site-packages directories, global and per user:

  1. Global site-packages directories are listed in sys.path when you run

     A directory in sys.path. In contrast to ordinary directories the pth