How to resolve os.walk error in a function?

def getFiles(_root):
    return next(os.walk(_root))[2]

root = "../../../Image/new_m/"
fileList = getFiles(root)  # return file list
fileList = sorted(fileList)

I get this error every time I try to run my function which is supposed to get files from my folder. The error shows StopIteration every time I try to run it.

import os
def getFiles(_root):
    try:
        return next(os.walk(_root))[2]
    except StopIteration:
        return []  # Return an empty list if the iterator is empty

root = "../../../Image/new_m/"
fileList = getFiles(root)
fileList = sorted(fileList)

You can try the above-mentioned code. It will resolve your issue.