Error message concerning path

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"

[Joe Vinciguerra]

The code you posted runs fine (see below). Is there something you left out that's causing the error?

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)

S = struct with fields:
    subpath: '/Users/Baso/Desktop/TMM/TMM45/m2m_TMM45/TMM45_tms_PH_simu'

[Nithin Kumar]

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]

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.

Answer 1

[Nithin Kumar]

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.