def iterdir(directory, recursive=False) -> List[Path]:

dirpath = Path(directory)

assert(dirpath.is_dir())

file_list = []

for x in dirpath.iterdir():

if x.is_file():

file_list.append(x)

elif x.is_dir() and recursive:

file_list.extend(iterdir(x))

return list(sorted(file_list))