setup.py 文件源码

def install_other(subdir):
    cwd = os.getcwd()
    path = os.path.join(cwd, subdir)

    try:
        os.chdir(path)
    except OSError, error:
        if error.errno not in (errno.ENOENT, errno.ENOTDIR):
            raise
        print >> sys.stderr, "Could not find directory %r" % path
        return

    try:
        module_info = imp.find_module("setup", ["."])
        imp.load_module("setup", *module_info)
    finally:
        os.chdir(cwd)