Python-сообщество

a = input()
f = float(a.replace(',','.'))
b = float(input())
c = input()
if b == 0 and (c == 'div' or 'mod' or '/'):
    print('Деление на 0!')
elif f == 0 and (c == 'div' or 'mod' or '/'):
    print('Деление на 0!')
elif c == '+':
    print(f + b)
elif c == '-':
    print(f - b)
elif c == '*':
    print(f * b)
elif c == '/':
    print(f / b)
elif c == 'mod':
    print(f % b)
elif c == 'div':
    print(f // b)
elif c == 'pow':
    print(f ** b)

[url=https://yadi.sk/i/ysDUPvW6dvRn0A]Задание[/url]