while True:
    try:
        result = float()
        first_num = float(input('Suda enter pervyi number '))
        action = input(str('Input action'))
        second_num = float(input('Suda enter vtoroi number '))

        if action == '+':
            result = first_num + second_num
            print(result)
        elif action == '-':
            result = first_num - second_num
            print(result)
        elif action == '*':
            result = first_num * second_num
            print(result)
        elif action == '/':
            result = first_num / second_num
            print(result)
        elif action not in ('/', '*', '+', '-'):
            print('Krivoe action')
        ex = str(input('Vyidem to talk? (Y/N)'))
        print(ex)
        if ex == 'N':
            pass
        elif ex == 'n':
            pass
        elif ex == 'Y':
            break
        elif ex == 'y':
            break
    except ZeroDivisionError as e:
            print('Are you mudak? na 0 nelzya delit!')
    except ValueError as q:
            print('Enter 4islo EPTA')