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光阴似箭催人老，日月如移越少年。
First get all the file names through API, and then save them as a list. After that, every time a file is read, the status of the corresponding file name is changed in the list to determine whether the file has been read.
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First get all the file names through API, and then save them as a list.
After that, every time a file is read, the status of the corresponding file name is changed in the list to determine whether the file has been read.