hi
I have been trying out singleton design pattern implementations..I
wrote this,
class Singleton(object):
_instance = None
def __new__(self, *args, **kwargs):
if not self._instance:
self._instance = super(Singleton, self).__new__(self,
*args, **kwargs)
return self._instance
class Mysingle(Singleton):
def __init__(self,name):
self.name=name
if __name__=='__main__':
s1=Mysingle('john')
s2=Mysingle('jim')
s3=Mysingle('jeff')
print 's1=',s1,s1.name
print 's2=',s2,s2.name
print 's3=',s3,s3.name
This is the result I got
s1= <__main__.Mysingle object at 0xb776492c> jeff
s2= <__main__.Mysingle object at 0xb776492c> jeff
s3= <__main__.Mysingle object at 0xb776492c> jeff
/home/dev/eclipse_workspace/pylearn/src/designpatterns.py:11:
DeprecationWarning: object.__new__() takes no parameters
self._instance = super(Singleton, self).__new__(self, *args,
**kwargs)
shouldn't the name of s1,s2,s3 be 'john' instead of 'jeff'?
Also,how do I correct the deprecation problem?Can somebody comment?
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