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並前往https://www.r-bloggers.com/2021/04/how-to-check-if-a-file-or-a-directory-exists-in-r-python-and-bash/

How to Check if a File or a Directory exists in R, Python and ...

Let's try now with a file that does not exist: if (file.exists("nofile.txt")) {. print("The file exists"). } else {.

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