类对象初始化过程

一、先调用__new__方法创建空的对象

二、再调用__init__方法进行对象进行实例化

三、有特殊类会使用__new__方法进行对象实例化，例如：tuple

四、实例：　

class A：
    def __new__(cls, *args, **kwargs):
        return super().__new__(cls, *args, **kwargs)

    def __init__(self, *args, **kwargs):
        self.args = args
        self.kwargs = kwargs

五、tuple的子类，自定义实现实例化方法：

tuple1 = (1, 2, 3, 'a,b,c', [1, 2, 3], 0)


class IntTuple(tuple):
    def __new__(cls, *args):
        t, = args
        f = (x for x in t if isinstance(x, int) and x > 0)
        return super().__new__(cls, f)


res = IntTuple(tuple1)
print(res)