PiggyBank/piggybank/cli/__init__.py

from typing import List

from piggybank.currencies import CURRENCIES

EPILOGUE = """This program is to assist you to keep track of how much coins
you have across your piggy banks."""


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