Hi, At Sage Days 24, I learned that Python allows the user to do arithmetic with bools:
In [1]: 5+True Out[1]: 6 In [2]: True + False Out[2]: 1 In [3]: 5+False Out[3]: 5 Sage seems to follow this convention as well: sage: 5 + True 6 sage: 5. - True 4.00000000000000 I can't see any use cases for this convention. I believe all these examples should just raise a TypeError. IMHO, code relying on this feature is very likely to be buggy. Apparently the symbolic ring doesn't handle things so well [1], but I'm not decided what the "fix" should be. :) [1] http://trac.sagemath.org/sage_trac/ticket/9560 Any comments? Cheers, Burcin -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
