On Feb 28, 6:34 pm, "Arnaud Delobelle" <[EMAIL PROTECTED]> wrote: > > So as long as you're dealing with something like > > invoices, Decimal does just fine. When you start real calculations, > > not only scientific, but even financial ones[1], it doesn't do any > > better then binary float, and it's bloody slow. > > I'm not doing 'real world' calcultations, I'm making an app to help > teach children maths.
Without divisions? > I need numerical values that behave well as > decimals. I also need them to have an arbitrary number of significant > figures. Floats are great but they won't help me with either. Amongst > other things, I need 3.0*0.1==0.3 to be True. How about (1.0/3.0)*3.0 == 1.0? That doesn't need to be True? > Please do not make the assumption that I have chosen to use a decimal > type without some careful consideration. Well, you didn't indicate this before. Anyway, in that case efficiency has no impact at all, so you might as well use Decimal. -- http://mail.python.org/mailman/listinfo/python-list
