# -*- coding: utf-8 -*-
from threading import RLock
single_lock = RLock()

def Singleton(cls):
    instance = {}

    def _singleton_wrapper(*args, **kargs):
        with single_lock:
            if cls not in instance:
                instance[cls] = cls(*args, **kargs)
        return instance[cls]

    return _singleton_wrapper


@Singleton
class SingletonTest(object):
    def __init__(self, name):
        self.name = name


slt_1 = SingletonTest('第1次创建')
print(slt_1.name)
slt_2 = SingletonTest('第2次创建')
print(slt_1.name, slt_2.name)

print(slt_1 is slt_2)