sysconfig.py 文件源码

def get_python_inc(plat_specific=0, prefix=None):
    """Return the directory containing installed Python header files.

    If 'plat_specific' is false (the default), this is the path to the
    non-platform-specific header files, i.e. Python.h and so on;
    otherwise, this is the path to platform-specific header files
    (namely pyconfig.h).

    If 'prefix' is supplied, use it instead of sys.prefix or
    sys.exec_prefix -- i.e., ignore 'plat_specific'.
    """
    if prefix is None:
        prefix = plat_specific and EXEC_PREFIX or PREFIX

    if os.name == "posix":
        if python_build:
            buildir = os.path.dirname(sys.executable)
            if plat_specific:
                # python.h is located in the buildir
                inc_dir = buildir
            else:
                # the source dir is relative to the buildir
                srcdir = os.path.abspath(os.path.join(buildir,
                                         get_config_var('srcdir')))
                # Include is located in the srcdir
                inc_dir = os.path.join(srcdir, "Include")
            return inc_dir
        return os.path.join(prefix, "include", "python" + get_python_version())
    elif os.name == "nt":
        return os.path.join(prefix, "include")
    elif os.name == "os2":
        return os.path.join(prefix, "Include")
    else:
        raise DistutilsPlatformError(
            "I don't know where Python installs its C header files "
            "on platform '%s'" % os.name)