PiggyBank/piggybank/cli/__init__.py

from typing import List

from piggybank.currencies import CURRENCIES

__all__ = ["complement_list_of_coins"]


def complement_list_of_coins(coins: List[int], currency: str,
                              _reversed: bool = False) -> List[int]:
    """Complements list of coins up to the count of currency's coins."""
    offset_array = [0] * (len(CURRENCIES[currency]) - len(coins))
    return offset_array + coins if not _reversed else coins + offset_array