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JobsDong/singleton.py

Created December 4, 2015 03:42
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python singleton
Raw
singleton.py
#!/usr/bin/python
# -*- coding: utf-8 -*-
import threading
class KbTerms(object):
"""singleton
"""
_instance_lock = threading.Lock()
@staticmethod
def instance():
if not hasattr(KbTerms, "_instance"):
with KbTerms._instance_lock:
if not hasattr(KbTerms, "_instance"):
setattr(KbTerms, "_instance", KbTerms())
return getattr(KbTerms, "_instance")
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