消息 [150572] - Python tracker

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作者	terry.reedy
收信人	alex, docs@python, loewis, terry.reedy
日期	2012-01-04.02:38:49
SpamBayes Score	0.00019666072
Marked as misclassified	否
Message-id	<1325644730.01.0.0342595612945.issue13707@psf.upfronthosting.co.za>
In-reply-to

内容
Martin, I do not understand. The default hash is based on id (as is default equality comparison), not value. Are you OK with hash values changing if the 'value' changes? My understanding is that changing hash values for objects in sets and dicts is bad, which is why mutable builtins with value-based equality do not have hash values.

Martin, I do not understand. The default hash is based on id (as is default equality comparison), not value. Are you OK with hash values changing if the 'value' changes? My understanding is that changing hash values for objects in sets and dicts is bad, which is why mutable builtins with value-based equality do not have hash values.

历史
日期	用户	动作	参数
2012-01-04 02:38:50	terry.reedy	修改	recipients: + terry.reedy, loewis, alex, docs@python
2012-01-04 02:38:50	terry.reedy	修改	messageid: <1325644730.01.0.0342595612945.issue13707@psf.upfronthosting.co.za>
2012-01-04 02:38:49	terry.reedy	链接	issue13707 messages
2012-01-04 02:38:49	terry.reedy	创建