[프로그래머스]문자열 계산

def solution(my_string):
    answer = 0
    Arithmetic = 1
    in_list = my_string.split(" ")
    print(in_list)
    for i in in_list:
        if i == "+" :
            Arithmetic = 1
        elif i == "-":
            Arithmetic = -1
        else : 
            answer += int(i)*Arithmetic
    return answer