On 12/27/11 10:28 , Ian Kelly wrote:
On Tue, Dec 27, 2011 at 10:41 AM, K Richard Pixley<r...@noir.com> wrote:
The conceptual leap for me was in recognizing that a class is just an
object. The best way, (imo, so far), to create a singleton in python is to
use the class itself as the singleton rather than ever instantiating it.
With a little work, you can even prevent it from ever being instantiated.
I don't think that's actually possible:
Python 3.2 (r32:88445, Feb 20 2011, 21:29:02) [MSC v.1500 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
class Foo:
... def __new__(cls):
... raise TypeError
... def __init__(self):
... raise TypeError
...
type(object.__new__(Foo))
<class '__main__.Foo'>
Try:
class Foo(object):
def __new__(cls):
return cls
--rich
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