Portable realpath script implementation in Python3

realpath.py

#!/usr/bin/env python3

from argparse import *
import pathlib
import os

parser = ArgumentParser(
    description='follow a symlink recursively.'
)

parser.add_argument(
    'file',
    type=pathlib.Path,
    help='path to the symlink'
)

args = parser.parse_args()

print(os.path.realpath(args.file))