Message 58176 - Python tracker

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In-reply-to
Author	alexandre.vassalotti
Recipients	alexandre.vassalotti
Date	2007年12月04日.05:43:55
SpamBayes Score	0.1424648
Marked as misclassified	No
Message-id	<1196747037.55.0.351183859041.issue1553@psf.upfronthosting.co.za>

Content
If an iterator with a __length_hint__ method that returns a negative integer is passed to list(), a SystemError is raised. >>> class A: ... def __iter__(self): ... return self ... def __length_hint__(self): ... return -1 ... >>> list(A()) Traceback (most recent call last): File "<stdin>", line 1, in <module> SystemError: NULL result without error in PyObject_Call

Content

If an iterator with a __length_hint__ method that returns a negative
integer is passed to list(), a SystemError is raised.
>>> class A:
... def __iter__(self):
... return self
... def __length_hint__(self):
... return -1
... 
>>> list(A())
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
SystemError: NULL result without error in PyObject_Call

History
Date	User	Action	Args
2007年12月04日 05:43:58	alexandre.vassalotti	set	spambayes_score: 0.142465 -> 0.1424648 recipients: + alexandre.vassalotti
2007年12月04日 05:43:57	alexandre.vassalotti	set	spambayes_score: 0.142465 -> 0.142465 messageid: <1196747037.55.0.351183859041.issue1553@psf.upfronthosting.co.za>
2007年12月04日 05:43:57	alexandre.vassalotti	link	issue1553 messages
2007年12月04日 05:43:56	alexandre.vassalotti	create

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