"Xavier Décoret" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > Hi, > > I cannot find the way to do generic lambda functions using the lambda > syntax in python. I am probably missing a point.
You are. Lambda is restricted to a _single expression_. Your first example is a statement, not an expression. Your second example attempts to do an assignment in the body of a lambda (although that's not what the code actually says) and assignment is a statement, not an expression. Lambda is intended for very simple, one line functions. It's also likely to go away in Python 3.0. Python, for better or worse, is a multi-paradigm language combining the object and procedural paradigms. It is not, and it is not intended to be, a functional style language. John Roth > > For example, the code > > # f = lambda : print "hello" > # f() > > does not compile, although: > > # def f(): > # print "hello" > # f() > > does compile. Is there a particular syntax for lambda that I am missing or > is it simply limited and I cannot do what I want with lambda. > > In the same spirit, how can I do to compute intermediary values in the > body of a lambda function. Let's say (dummy example): > > f = lambda x : y=x*x,y+y > > > In languages like Caml, you can do: > > let f = function x -> let y=x*x in y+y;; > > Does the lambda : syntax in python allow for the same kind of constructs? > > Thanks. -- http://mail.python.org/mailman/listinfo/python-list
