build_ext.py 文件源码

def get_ext_filename(self, ext_name):
        r"""Convert the name of an extension (eg. "foo.bar") into the name
        of the file from which it will be loaded (eg. "foo/bar.so", or
        "foo\bar.pyd").
        """
        from distutils.sysconfig import get_config_var
        ext_path = string.split(ext_name, '.')
        # OS/2 has an 8 character module (extension) limit :-(
        if os.name == "os2":
            ext_path[len(ext_path) - 1] = ext_path[len(ext_path) - 1][:8]
        # extensions in debug_mode are named 'module_d.pyd' under windows
        so_ext = get_config_var('SO')
        if os.name == 'nt' and self.debug:
            return os.path.join(*ext_path) + '_d' + so_ext
        return os.path.join(*ext_path) + so_ext