amount = eval(input('Bitte gib einen Euro Betrag ein: '))
coins = []
cents = [2000, 1000, 500, 200, 100, 50, 20, 10, 5, 2, 1]
amount = int(float(amount) * 100)
for cent in cents:
    while amount >= cent:
        amount -= cent
coins.append(cent)
print([(coin / 100.0) for coin in coins])
Python counting through a number with >=