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 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)

 if b == 0 and (c == 'div' or 'mod' or '/') and not(c == '-' or '+')

 Test input:
5.0
0.0
mod 
Correct output:
Деление на 0!
Your code output:
Error:
Traceback (most recent call last):
  File "jailed_code", line 16, in <module>
    print(f % b)
ZeroDivisionError: float modulo

 Traceback (most recent call last):
  File "jailed_code", line 18, in <module>
    print(f // b)
ZeroDivisionError: float divmod()

 a = input()
f = float(a.replace(',','.'))
b = float(input())
c = input()
try:
    if 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)
except ZeroDivisionError:
    print('Деление на 0!')
except Exception as err:
    print(err)