python_argparse.md

parser = argparse.ArgumentParser()

---

Positional argument

Required

parser.add_argument("db" , help="")
parser.add_argument("square", type=int) # must be int value

Optional

parser.add_argument("db" , help="", nargs='?', default='/nas/pwned-passwords-sha1-ordered-by-count-v7.txt')

Non-positional argument

Required

parser.add_argument("-n", "--name", help="server_name")
parser.add_argument("-v", "--verbosity", type=int, choices=[0, 1, 2]) # restrict choices

Optional

parser.add_argument("--bridge", help="Bridge name", default='telegram', action='store')
parser.add_argument("--verbosity", action='store_true') # true/false value

Counter

parser.add_argument("-v", "--verbosity", action="count") # -vv counts for 2
parser.add_argument("-v", "--verbosity", action="count", default=1) # -vv counts for 2, and the default is -v (a.k.a 1)

---

args = parser.parse_args()