如果您无法列出该文件，则表示该文件不存在。

If you can't list it, then it doesn't exist.

youdao

顺便说一下，如果该文件不存在，那么会创建一个文件。

By the way, in case the file does not exist, then the file will be created.

youdao

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。

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

youdao