singleton ... again

Tue Feb 11 23:34:37 EST 2014

playing a bit with subject. 
pros and cons of this approach? did i create bicycle again? :-)
class myclass(object):
 class_instance = None

 def __new__(cls, *args, **kwargs):
 if myclass.class_instance == None:
 return object.__new__(cls)
 return myclass.class_instance
 def __init__(self, some):
 if self.__class__.class_instance == None: # init blocker 
 self.__class__.class_instance = self
 self.member = some

 def __del__(self):
 self.__class__.class_instance = None

one_class = myclass(1)
print(id(one_class), one_class.member )
two_class = myclass(2)
print(id(two_class), two_class.member)