学习笔记，单例

class test(object):flog = Noneflog1 = Falsedef __new__(cls, *args, **kwargs):if cls.flog is None:cls.flog = super().__new__(cls)return cls.flogdef __init__(self):if not test.flog1:print("初始化")test.flog1 = Trueabc = test()
bcd = test()
print(abc)
print(bcd)