demo.py

from argparse import ArgumentParser
from tap import Tap


def add_one(num: int) -> int:
    return num + 1


# ----- ArgumentParser -----

parser = ArgumentParser()
parser.add_argument('--rnn', type=str, required=True,
                    help='RNN type')
parser.add_argument('--hidden_size', type=int, default=300,
                    help='Hidden size')
parser.add_argument('--dropout', type=float, default=0.2,
                    help='Dropout probability')


args = parser.parse_args()

print(args.hidden_size)  # no autocomplete, no type inference, no source code navigation

add_one(args.rnn)  # no static type checking


# ----- Tap -----

class MyTap(Tap):
    rnn: str  # RNN type
    hidden_size: int = 300  # Hidden size
    dropout: float = 0.2  # Dropout probability


args = MyTap().parse_args()

print(args.hidden_size)  # autocomplete, type inference, source code navigation

add_one(args.rnn)  # static type checking