class CCLK(object):

    isinstance = None

    #創(chuàng)建對(duì)象會(huì)自動(dòng)調(diào)用 __new__ 方法申請(qǐng)內(nèi)存
    #重寫 __new__方法
    @classmethod
    def __new__(cls,*args,**kwargs):
        if cls.isinstance is None:
        #申請(qǐng)內(nèi)存，創(chuàng)建一個(gè)對(duì)象，并把對(duì)象的類型設(shè)置為cls
            cls.isinstance = object.__new__(cls)
        return cls.isinstance

    def __init__(self,name,age) -> None:
        self.name = name
        self.age = age


a = CCLK(11,100)
aa = CCLK(111,1000)
print(a is aa)