This issue tracker has been migrated to GitHub, and is currently read-only.
For more information, see the GitHub FAQs in the Python's Developer Guide.

Author terry.reedy
Recipients Amit.Saha, docs@python, ezio.melotti, georg.brandl, rhettinger, terry.reedy
Date 2013-05-04.22:12:48
SpamBayes Score -1.0
Marked as misclassified Yes
Message-id <>
If you take the union/intersection/symmetric difference of n sets, the result is a set with all items that appears in one/all/an odd number of the n sets. The union and intersection methods actually accept n inputs, because the result is obvious, useful, and can be obtained faster that with n-1 binary operations. The symmetric_difference method does not, I presume because the result in not obvious (but that cuts both ways), not known to be useful, and perhaps would not be much faster than than n-1 binary operations.
Date User Action Args
2013-05-04 22:12:48terry.reedysetrecipients: + terry.reedy, georg.brandl, rhettinger, ezio.melotti, docs@python, Amit.Saha
2013-05-04 22:12:48terry.reedysetmessageid: <>
2013-05-04 22:12:48terry.reedylinkissue17854 messages
2013-05-04 22:12:48terry.reedycreate