On Tue, Jul 7, 2009 at 8:01 PM, pdpi<pdpinheiro at gmail.com> wrote: > He asserts: > assert lo < hi > but then compares: > sense = cmp(func(hi), func(lo)) > > sense can't ever be anything other than 1. It can - there is no necessity that func is monotonically increasing. -- André Engels, andreengels at gmail.com