fewest_coins_and_bills5a.py

def get_amt_from_user_and_check_format():
    while True:
        print("Enter an amount of money in dollars and/or cents -- 234 or 234.56 or 0.56 or .56 or .09")
        print("The amount must be less than $10,000,000,000,000 (ten trillion dollars)")
        try:
            money = input("Amount > ")
            print()
            money = money.lstrip('$')
            money = float(money)
            if money >= 10000000000000:
                print("That's too large an amount to compute.")
                continue

            if money == 0:
                print("You entered a zero amount")
                continue

            money = str(money)

            dollars = money.partition('.')[0]
            cents = money.partition('.')[2]
            if len(cents) == 1:
                cents += '0'
            elif len(cents) > 2:
                print('Incorrect format: cents must be in 2 digits.')
                continue
            money = dollars + '.' + cents
            dollars, cents = int(dollars), int(cents)
            return money, dollars, cents
        except ValueError:
            print('Incorrect format')

def process_dollars_to_bills(dollars):
    if dollars == 0:
        return [], 0
    bills_value_list = [100, 50, 20, 10, 5, 1]
    bills_denomination_singular_list = ['hundred', 'fifty', 'twenty', 'ten', 'five', 'one']
    bills_denomination_plural_list = ['hundreds', 'fifties', 'twenties', 'tens', 'fives', 'ones']

    bills_count = 0
    bills_list = []
    for idx, value in enumerate(bills_value_list):
        if dollars/value >= 1:
            bills_count += int(dollars/value)
            if int(dollars/value) >= 2:
                bills_list.append((int(dollars/value), bills_denomination_plural_list[idx]))
            else:
                bills_list.append((int(dollars/value), bills_denomination_singular_list[idx]))
            dollars -= int(dollars/value) * bills_value_list[idx]

            if dollars == 0:
                return bills_list, bills_count

def process_cents_to_coins(cents):
    if cents == 0:
        return [], 0

    coins_value_list = [50, 25, 10, 5, 1]

    coins_denomination_singular_list = ['half-dollar', 'quarter', 'dime', 'nickel', 'penny']
    coins_denomination_plural_list = ['half-dollars', 'quarters', 'dimes', 'nickels', 'pennies']

    coins_count = 0

    coins_list = []
    for idx, value in enumerate(coins_value_list):
        if cents/value >= 1:
            coins_count += int(cents/value)
            if int(cents/value) >= 2:
                coins_list.append((int(cents/value), coins_denomination_plural_list[idx]))
            else:
                coins_list.append((int(cents/value), coins_denomination_singular_list[idx]))
            cents -= int(cents/value) * coins_value_list[idx]

            if cents == 0:
                return coins_list, coins_count

def process_coins_and_bills_lists_and_print(bills_list, coins_list, money):
    coins_bills_list = bills_list+coins_list
    print("money = $", money, ' =', sep ='', end='')
    for x in coins_bills_list[:-1]:
        print(' ', x[0], ' ', x[1], ',', sep='', end='')
    print(' ', coins_bills_list[-1][0], ' ', coins_bills_list[-1][1], sep='')

def print_number_of_bills_and_coins(bills_count, coins_count):
    print("The number of bills and coins =", bills_count + coins_count)

def main():
    money, dollars, cents = get_amt_from_user_and_check_format()
    bills_list, bills_count = process_dollars_to_bills(dollars)
    coins_list, coins_count = process_cents_to_coins(cents)
    process_coins_and_bills_lists_and_print(bills_list, coins_list, money)
    print_number_of_bills_and_coins(bills_count, coins_count)

if __name__ == '__main__':
    main()