"Peter Otten" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > Sergey Dorofeev wrote: > >> 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: [sin(x2) + cos(x2) for x2 in [x*x]][0])(.5) == sin(.5*.5) + > cos(.5*.5) > True > > The real answer is of course: Use a function.
But what about something like lambda x: sin(y)+cos(y) where y=x*x ? May be this could be a PEP? If there is no straight way to do this. -- http://mail.python.org/mailman/listinfo/python-list
