gistfile1.py

denominations_USD = [
	{ 'title': 'Hundred-dollar bill', 'count': 0, 'val': 10000 },
	{ 'title': 'Fifty-dollar bill', 'count': 0, 'val': 5000 },
	{ 'title': 'Ten-dollar bill', 'count': 0, 'val': 1000 },
	{ 'title': 'Five-dollar bill', 'count': 0, 'val': 500 },
	{ 'title': 'One-dollar bill', 'count': 0, 'val': 100 },
	{ 'title': 'Quarter', 'count': 0, 'val': 25 },
	{ 'title': 'Dime', 'count': 0, 'val': 10 },
	{ 'title': 'Nickel', 'count': 0, 'val': 5 },
	{ 'title': 'penny', 'count': 0, 'val': 1 }
]

def currency_converter( amount=0, units=[] ):
	amount *= 100

	for unit in units:
		while( amount != 0 and amount >= unit['val'] ):
			amount -= unit['val']
			unit['count'] += 1

	return units

def currency_display( amount=0, units=denominations_USD ):
	units = currency_converter( amount , units )

	for unit in units:
		if unit['count'] == 0: continue

		t = [ unit['count'], unit['title'], '\'s' if unit['count'] > 1 else '' ]
		print( '{} {}{}'.format(*t) )

	return None

currency_amount = float( input('Convert: ') )
currency_display( currency_amount )