Hi Bruce, On Sat, May 17, 2014 at 12:29:54PM -0700, Bruce wrote: > I changed this to > > class Foo(Element): > def __init__(self, a): > self.data = a > Element.__init__(self, Foos) > > which seems a bit simpler as we still have Foo(1) without an extra > argument.
Notes: - this should be `Foos()`, rather than Foos - elements are more often than not constructed from their parent as: sage: F = Foos() sage: F(data) In this situation, both the parent and the data is passed to the constructor of the element class. - In case your data structure consists of a single value, you can use ElementWrapper which does exactly the above __init__ for you together with some other goodies. For an example, see sage: S = Semigroups().example() sage: S?? Cheers, Nicolas -- Nicolas M. ThiƩry "Isil" <nthi...@users.sf.net> http://Nicolas.Thiery.name/ -- You received this message because you are subscribed to the Google Groups "sage-combinat-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-combinat-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-combinat-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-combinat-devel. For more options, visit https://groups.google.com/d/optout.