sys.exec_prefix

exec_prefix

A string giving the site-specific directory prefix where the platform-dependent Python files are installed; by default, this is also '/usr/local'. This can be set at build time with the —exec-prefix argument to the configure script. Specifically, all configuration files (e.g. the pyconfig.h header file) are installed in the directory `exec_prefix + ‘/lib/pythonversion/config’`, and shared library modules are installed in exec_prefix + '/lib/pythonversion/lib-dynload', where version is equal to version[:3].