Find File With Largest Number In Filename In Each Sub-directory With Python?

I am trying to find the file with the largest number in the filename in each subdirectory. This is so I can acomplish opening the most recent file in each subdirectory. Each file

Solution 1:

Your second code block does almost what you want to do, you've just nested your operations incorrectly.

for root, dirs, files in os.walk(path):
    # new subdir, so let's make a new...
    list_of_files = []
    for name in files:
        if name.endswith((".xlsx")):
            list_of_files.append(name)  # you originally appended the list of all names!# once we're here, list_of_files has all the filenames in it,# so we can find the largest and print it
    largest = max(list_of_files)
    print (largest)

If I can suggest a shorter solution:

[(root, max(fname for fname in files if fname.endswith(".xlsx"))) for
 root, dirs, files inos.walk(path)]

This will give you a list of (dirname, largest_filename) pairs, rather than just printing them to the screen.