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Author jyasskin
Recipients jyasskin
Date 2008-03-17.16:45:05
SpamBayes Score 0.42594028
Marked as misclassified No
Message-id <[email protected]>
In-reply-to
Content 
>>> class Meta(type):
...   def __instancecheck__(self, other):
...     return False
>>> isinstance(3, Meta)

In 2.6, this results in:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
RuntimeError: maximum recursion depth exceeded while calling a Python object
(That's a recursion in C, through PyObject_IsInstance and
instancemethod_call)

In 3.0, I get:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: __instancecheck__() takes exactly 2 positional arguments (1
given)
History
Date User Action Args
2008-03-17 16:45:07jyasskinsetspambayes_score: 0.42594 -> 0.42594028
recipients: + jyasskin
2008-03-17 16:45:06jyasskinsetspambayes_score: 0.42594 -> 0.42594
messageid: <[email protected]>
2008-03-17 16:45:06jyasskinlinkissue2325 messages
2008-03-17 16:45:05jyasskincreate