Syntax for one-line "nonymous" functions in "declaration style"

[Alexey Muranov]

Whey you need a simple function in Python, there is a choice between a 
normal function declaration and an assignment of a anonymous function 
(defined by a lambda-expression) to a variable:

    def f(x): return x*x

or

    f = lambda x: x*x

It would be however more convenient to be able to write instead just

    f(x) = x*x

(like in Haskell and such).

Have this idea been discussed before?

I do not see any conflicts with the existing syntax.   The following 
would also work:

    incrementer(m)(n) = n + m

instead of

    incrementer = lambda m: lambda n: n + m

Alexey.