Message 109941 - Python tracker

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In-reply-to
Author	rhettinger
Recipients	eric.araujo, rhettinger, stutzbach
Date	2010年07月10日.22:08:11
SpamBayes Score	0.0010748806
Marked as misclassified	No
Message-id	<1278799693.46.0.117414707331.issue9212@psf.upfronthosting.co.za>

Content
Concrete classes are allowed to have more features than the corresponding ABC. The ABCs are not intended to be full-featured; instead, they specify the part of the API that will be guaranteed. For example, the union() method for built-in sets allows two or more set arguments, but the corresponding method for the ABC is limited to two arguments. This was an intentional difference, designed to make it easier for people to implement a Set class. That being said, the omission of isdisjoint() was an oversight and I see no reason that this shouldn't be fixed.

Content

Concrete classes are allowed to have more features than the corresponding ABC. The ABCs are not intended to be full-featured; instead, they specify the part of the API that will be guaranteed. For example, the union() method for built-in sets allows two or more set arguments, but the corresponding method for the ABC is limited to two arguments. This was an intentional difference, designed to make it easier for people to implement a Set class.
That being said, the omission of isdisjoint() was an oversight and I see no reason that this shouldn't be fixed.

History
Date	User	Action	Args
2010年07月10日 22:08:13	rhettinger	set	recipients: + rhettinger, stutzbach, eric.araujo
2010年07月10日 22:08:13	rhettinger	set	messageid: <1278799693.46.0.117414707331.issue9212@psf.upfronthosting.co.za>
2010年07月10日 22:08:11	rhettinger	link	issue9212 messages
2010年07月10日 22:08:11	rhettinger	create

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