buds.py

#!/usr/bin/env python3

from random import shuffle
from sys import argv
from typing import Iterator, List, Tuple


def pairs(names: List[str], default: str) -> Iterator[Tuple[str, str]]:
    names = names.copy()

    if len(names) % 2 != 0:
        names.append(default)

    shuffle(names)

    return ((names.pop(), names.pop()) for _ in range(len(names) // 2))


if __name__ == '__main__':
    default = 'jp'

    if len(argv) < 2:
        print('Usage: ./buds.py [NAME] [NAME] ...')

    names = argv[1:]
    width = len(max(names, key=len))

    for name1, name2 in pairs(names, default):
        print(f'{name1:<{width}}   {name2:<{width}}')