Python单例模式的简单写法
class Singleton:
__instance = None
def __init__(self):
pass
def __new__(cls, *args, **kwargs):
if not cls.__instance:
cls.__instance = super(Singleton, cls).__new__(cls, *args, **kwargs)
return cls.__instance
# Test Singleton
s1 = Singleton()
s2 = Singleton()
print('s1 is s2', s1 is s2)
print('s1 == s2', s1 == s2)
程序的运行结果如下:
有关Python单例模式的其他写法,见这篇文章