I did not put memoize on __new__. I put it on the metaclass __call__.
Here is my memoize:
def memoize(func):
memoize_dic = {}
def wrapped_func(*args):
if args in memoize_dic:
return memoize_dic[args]
else:
result = func(*args)
memoize_dic[args] = result
return result
wrapped_func.__name__ = func.__name__
wrapped_func.__doc__ = func.__doc__
wrapped_func.__dict__ = func.__dict__
return wrapped_func
class Memoize(type): # Singleton is a special case of Memoize
@memoize
def __call__(cls, *args):
return super(Memoize, cls).__call__(*args)
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