没烧开的汽水

#1 Created at ... [Delete] [Delete and Lock User]

class partial:
    def __new__(cls, func, *args, **kwargs):
        if not callable(func):
            raise TypeError("the first argument must be callable")
        self = super().__new__(cls)

        self.func = func
        self.args = args
        self.kwargs = kwargs
        return self

    def __call__(self, *args, **kwargs):
        return self.func(*self.args, *args, **self.kwargs, **kwargs)

使用：

def add(x, y):
    return x + y

inc = partial(add, y=1)
print(inc(41))  # 42

后付费环境

#2 Created at ... [Delete] [Delete and Lock User]

你这样太超前了，写了个类还是超类，看的一脸懵逼

没烧开的汽水

#3 Created at ... [Delete] [Delete and Lock User]

我发现上面的 __call__ 不支持覆盖参数，更新下：

    def __call__(self, *args, **kwargs):
        newkeywords = self.kwargs.copy()
        newkeywords.update(kwargs)
        return self.func(*self.args, *args, **newkeywords)

陈泰迪

#4 Created at ... [Delete] [Delete and Lock User]

超纲了啊喂！

梦里昭华

#5 Created at ... [Delete] [Delete and Lock User]

我看了你的回答觉得你的水平很高，我有个问题想请教,希望可以得到你的回复：例子中： import functools max2=functools.partial(max,10) 这个偏函数解释是10自动加到了args的左边因为参数的章节说的可变参数是可以任意数量的对吧，args是可变参数的话，那比如我想把10和20甚至更多的数作为默认参数放在max2中我该怎么是实现呢？希望你可以回复我谢谢