面向对象的函数参数来改变变量

Question

我正在尝试将我的程序转换为面向对象的样式。目前，我有一个 brandSelector() 函数，它接受查询输入并找到查询和品牌数组之间的交集。但是，我正在尝试将 brandSelector() 转换为通用 Selector() 或交集查找器。例如，我可以使用类型和查询 (Selector(type, query)) 调用。在这种情况下，您将键入 Selector(brand, query)。该附加参数定义检查哪个数组以及设置哪个变量——或者，一个 if 语句就足够了——但我不确定如何实现这样的系统。我将不胜感激任何解决方案或建议。谢谢，

brands = ["apple", "android", "windows"]
brand = None

def Main():
    query = input("Enter your query: ").lower()
    brand = brandSelector(query)

def brandSelector(query):
    try:
        brand = set(brands).intersection(query.split())
        brand = ', '.join(brand)
        #Check Condition After Setting
        int_cond = confirmIntersection(brand)
        if int_cond == False:
            raise NameError("No Intersection")
        return brand
    except NameError:
        print("\nNo Intersection found between query defined brand and brands array\n")
        return brandDetectionFailure()

完整代码：https://github.com/KentCoding/phoneTroubleshooting/blob/master/phoneTroubleshooting.py Python版本：v3.5.2

我的尝试：

def Main():
    init()
    query = input("Enter your query: ").lower()
    brand = Selector(brand, brands, query)
    keywordSelection(query, brand)
def Selector(var, array, query):
    try:
        #Format Brands Query
        var = set(array).intersection(query.split())
        var = ', '.join(var)
        #Check Condition After Setting
        int_cond = confirmIntersection(var)
        if int_cond == False:
            raise NameError("No Intersection")
        return var
    except NameError:
        print("\nNo Intersection found between query defined brand and brands array\n")
        return brandDetectionFailure()

但是给出了错误： UnboundLocalError: local variable 'brand' referenced before assignment

Answer 1

据我所知，没有理由将名为 var 的参数传递给 Selector()，因此只需将其设为 def Selector(array, query): 并使用 brand = Selector(brands, query) 调用它。