"""
Return list of all paths to sub folders

:param path: string path to work on
:param root: string root path to sto at
:param reversed: boolean return a reverse sortd list
:param ret: list of sub paths, used for recoursive calls internally

:return: list of sub paths
:rtype: list
"""
def sub_paths(path, root=None, reversed=False, ret=None):
    if ret == None: ret = [path] # default return list empty, allocate new list
    next = os.path.dirname(path)

    # return if we ran out of parts or hit the root
    if next == "" or root == next:
        if root == next: ret.append(next)
        if reversed: return ret.reverse()
        return ret

    ret.append(next)
    sub_paths(next, root, reversed, ret)

    return ret

sub_paths("C:/Users/wus/Drones/Tools")
print("")
sub_paths("C:/Users/wus/Drones/Tools", None, True)
print("")
sub_paths("C:/Users/wus/Drones/Tools", "C:/Users", True)