Hi John, > One of the examples in the docstring for DisjointUnionEnumeratedSet > goes something like this: > > sage: U = DisjointUnionEnumeratedSets(Family(NonNegativeIntegers(), > Permutations)) > sage: it = iter(U) > sage: it.next() > [] > > If I try the same thing, replacing "Permutations" with "Partitions", > it doesn't work: > > sage: U = DisjointUnionEnumeratedSets(Family(NonNegativeIntegers(), > Partitions)) > sage: it = iter(U) > sage: it.next() > --------------------------------------------------------------------------- > ValueError Traceback (most recent call > [...] > Is this expected?
I can't reproduce the problem with sage 4.4.2: tomahawk-~ $ sage ---------------------------------------------------------------------- | Sage Version 4.4.2, Release Date: 2010-05-19 | | Type notebook() for the GUI, and license() for information. | ---------------------------------------------------------------------- sage: U = DisjointUnionEnumeratedSets(Family(NonNegativeIntegers(), Partitions)) sage: it = iter(U) sage: it.next() [] sage: it.next() [1] sage: it.next() [2] sage: it.next() [1, 1] sage: it.next() [3] sage: it.next() [2, 1] sage: it.next() [1, 1, 1] sage: quit Exiting Sage (CPU time 0m0.12s, Wall time 0m13.00s). Which version of sage are you using ? Cheers, Florent -- You received this message because you are subscribed to the Google Groups "sage-combinat-devel" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/sage-combinat-devel?hl=en.
