If the file does not exist (as determined by the file open error), write the "null" state to the file.

如果该文件不存在(由文件打开错误确定)，则把“null”状态写入文件。

youdao

If the file does not exist (as determined by the file open error), write the "null" state to the file.

如果该文件不存在(由文件打开错误确定)，则把“null”状态写入文件。

youdao