One can ensure the path is a valid directory with something like:
import argparse, os
def dir_path(string):
if os.path.isdir(string):
return string
else:
raise NotADirectoryError(string)
parser = argparse.ArgumentParser()
parser.add_argument('--path', type=dir_path)
# ...
Check is possible for files using os.path.isfile()
instead, or any of the two using os.path.exists()
.