Author serhiy.storchaka
Recipients mark.dickinson, rhettinger, serhiy.storchaka
Date 2017-03-17.20:27:26
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Marked as misclassified Yes
Message-id <1489782446.56.0.355449112547.issue29840@psf.upfronthosting.co.za>
In-reply-to
Content
For now bool() raises OverflowError if __bool__ is not defined and __len__ returns large value.

>>> class A:
...     def __len__(self):
...         return 1 << 1000
... 
>>> bool(A())
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
OverflowError: cannot fit 'int' into an index-sized integer
>>> bool(range(1<<1000))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
OverflowError: Python int too large to convert to C ssize_t

Proposed patch makes bool() returning True if len() raises OverflowError.

This is an alternate solution of issue28876.
History
Date User Action Args
2017-03-17 20:27:26serhiy.storchakasetrecipients: + serhiy.storchaka, rhettinger, mark.dickinson
2017-03-17 20:27:26serhiy.storchakasetmessageid: <1489782446.56.0.355449112547.issue29840@psf.upfronthosting.co.za>
2017-03-17 20:27:26serhiy.storchakalinkissue29840 messages
2017-03-17 20:27:26serhiy.storchakacreate