On Jun 1, 9:51 am, "Sergey Dorofeev" <ser... at fidoman.ru> wrote: > Hello all! > > Please help, is there way to use sub-expressions in lambda? > For example, if I want to calculate sin(x^2)+cos(x^2) I must code: > lambda x: sin(x*x)+cos(x*x) > How to make x*x to be evaluated once? lambda x: (lambda y=x*x: math.sin(y)+math.cos(y))() Kay