On 9/1/10 7:25 PM, David Roe wrote:
P.S. To find an example of two parents which currently compare as equal but are not the same object, do sage: R = Zp(5, print_sep="|") sage: S = Zp(5, print_sep=":") sage: R == S True sage: R is S False
Carl Witty commented on a similar issue in printing in the RealField code, and I think he has a very good point. Printing defaults should not be stored in the parent, but instead should be something like a module-level option that can be freely set and changed. See http://trac.sagemath.org/sage_trac/ticket/7682 (except that Trac doesn't seem to want to display the ticket right now).
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