如何根据字符串列表获取值？如果不在列表中，则获取值错误

def get_value_from_list(string_list, target_string):
    for string in string_list:
        if string == target_string:
            return string
    return "获取值错误"

# 示例用法
my_list = ["apple", "banana", "orange"]
target = "banana"
result = get_value_from_list(my_list, target)
print(result)  # 输出：banana

target = "grape"
result = get_value_from_list(my_list, target)
print(result)  # 输出：获取值错误