Error message concerning path

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Reuben Addison
Reuben Addison 2023-3-22
回答： Nithin Kumar 2023-4-1
I am trying to make a loop over several folders using a path for my function but when I test the code I get
subject_number = "45";
maindir = sprintf('/Users/Baso/Desktop/TMM/TMM%s/m2m_TMM%s', subject_number,subject_number);
part = sprintf('/TMM%s_tms_PH_simu', subject_number);
S.subpath = maindir;
S.subpath = fullfile(maindir, part);
I keep getting the error "TypeError: stat: path should be string, bytes, os.PathLike or integer, not NoneType"
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Nithin Kumar
Nithin Kumar 2023-3-31
编辑：Nithin Kumar 2023-3-31
Hi Reuben,
I have executed the code that you have provided and it is working fine. I would like to know more details regarding the issue you are facing.
Stephen23
Stephen23 2023-3-31
编辑：Stephen23 2023-3-31
That is a Python error: it refers to Python's inbuilt "os" module:
https://docs.python.org/3/library/os.html
and to Python's object type "NoneType":
https://docs.python.org/3/library/constants.html#:~:text=instance%20of%20the-,NoneType%20type,-.
You should be asking on a Python forum.

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回答（1 个）

Nithin Kumar
Nithin Kumar 2023-4-1
Hi Reuben,
I understand that you are facing an issue while trying to loop over several folders using a path. The error message "Typeerror: stat: path should be string, bytes, os.pathlike or integer, not NoneType" occurs when you are trying to perform a file operation and the path that you have provided is not a valid path.
To resolve this error, you should check that the path you are providing is a valid file path. You can use the "exist" function to check if a file or folder exists. Kindly refer to the following link to go through the "exist" function.
https://in.mathworks.com/help/matlab/ref/exist.html
You should also make sure that the path is formatted correctly and that you are using the correct file extension.
I hope this answer resolves the issue you are encountering.

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