类的单列模式

呵呵哒....

class clss:
    #等于触发对象 clss()
    __static = None
    def __init__(self):
        pass
    @staticmethod
    def static_def():
        if clss.__static:
            return clss.__static
        else:
            clss.__static = clss()
            return clss.__static

    def yujia(self):
        print('11')

    def youyong(self):
        if clss.__static:
            return clss.__static
        else:
            clss.__static = clss()
            return clss.__static
    def ticao(self):
        pass
    def music(self):
        pass
w = clss.static_def()

w.yujia()
q = clss().youyong()
print(q)
q.yujia()
e = clss().youyong()
print(e)
e.yujia()