ext_open/util.py

from ctypes import windll
import os
#https://stackoverflow.com/questions/827371/is-there-a-way-to-list-all-the-available-drive-letters-in-python 
#u=RichieHindle
def get_drives():
    uppercase = map(chr,range(ord('A'),ord('A')+26))
    drives = []
    bitmask = windll.kernel32.GetLogicalDrives()
    for letter in uppercase:
        if bitmask & 1:
            drives.append(f'{letter}:\\')
        bitmask >>= 1

    return drives

def no_parents(paths):
    paths = sorted(paths,key=len)
    ret = []
    paths
    while len(paths) > 0:
        el1 = paths[0]
        ret.append(el1)
        old_paths = paths[1:]
        paths = []
        for path in old_paths:

            if not path.startswith(el1):
                paths.append(path)
    return ret