Revision: 50165
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at August 13, 2011 06:24 by fnl
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class Singleton(type):
"""Singleton metaclass. Do NOT inherit!
Usage:
class MyClass(object):
__metaclass__ = Singleton
...
"""
def __init__(mcs, name, bases, dic):
super(Singleton, mcs).__init__(name, bases, dic)
mcs.__instance = None
def __call__(mcs, *args, **kw):
if mcs.__instance is None:
mcs.__instance = super(Singleton, mcs
).__call__(*args, **kw)
return mcs.__instance
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Singleton class
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Python