定义装饰器中的使用次数(带有装饰器的单例模式)

def singleton(cls):
    instances = {}

    def wrapper(*args, **kwargs):
        if cls not in instances:
            instances[cls] = cls(*args, **kwargs)
        return instances[cls]

    return wrapper

@singleton
class MyClass:
    def __init__(self, arg1, arg2):
        self.arg1 = arg1
        self.arg2 = arg2

# 使用示例
obj1 = MyClass("foo", "bar")
obj2 = MyClass("baz", "qux")

print(obj1 is obj2)  # 输出: True，obj1和obj2是同一个实例