Argparse in iPython notebook: unrecognized arguments: -f

It's better to use @nbro 's answer for Jupyter execution.

args = parser.parse_args(args=[])

If you want to manage parameters as class format, you can try this.

class Args:
  data = './data/penn'
  model = 'LSTM'
  emsize = 200
  nhid = 200

args=Args()

You can try args = parser.parse_args(args=[]).