rechnung_beispiel

from functools import partial
import locale
from decimal import Decimal

def rechnung(produkte, mwst, loc='de_DE.utf-8'):
    locale.setlocale(locale.LC_ALL, loc)
    pos_fmt = '{:<5}{:<15}{:>20}'
    sum_fmt = partial(pos_fmt.format, '')
    print(pos_fmt.format('Pos.', 'Produkt', 'Preis'))
    print('-'*40)
    print()
    summe = 0
    for position, element in enumerate(produkte, start=1):
        produkt, preis = element
        fpreis = locale.currency(preis)
        ausgabe = pos_fmt.format(position * 10, produkt, fpreis)
        summe += preis
        print(ausgabe)
    print()
    print('='*40)
    print()
    smwst = summe / 100 * mwst
    netto = summe / (100 + mwst) * 100
    fsumme = locale.currency(summe)
    fmwst = locale.currency(smwst)
    fnetto = locale.currency(netto)

    print(sum_fmt('Summe', fsumme))
    print(sum_fmt('Mwst.', fmwst))
    print(sum_fmt('Netto', fnetto))

produkte = [
    ('Fön', Decimal('20.00')),
    ('Gitarre', Decimal('1450.99')),
    ('DLSR', Decimal('599.75'))
    ]

rechnung(produkte, 19)