Move Pluralsight's exercise PDF out of its folder and prefix with folder name

pluralsight-move.py

import sys
from os import listdir, getcwd, rename
from os.path import isfile, join

try:
    cwd = sys.argv[1]
except:
    cwd = getcwd()

for items in listdir(cwd):
    full_path = join(cwd, items)
    if not isfile(full_path):
        for subitems in listdir(full_path):
            old_path = join(full_path, subitems)
            new_path = join(cwd, f"{items}-{subitems}")
            rename(old_path, new_path