22 lines
595 B
Python
22 lines
595 B
Python
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from threading import RLock
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class Singleton(object):
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single_lock = RLock()
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def __init__(self, name):
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if hasattr(self, 'name'):
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return
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self.name = name
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def __new__(cls, *args, **kwargs):
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with Singleton.single_lock:
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if not hasattr(Singleton, "_instance"):
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Singleton._instance = object.__new__(cls)
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return Singleton._instance
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single_1 = Singleton('第1次创建')
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single_2 = Singleton('第2次创建')
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print(single_1.name, single_2.name) # 第2次创建 第2次创建
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print(single_1 is single_2) # True
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