Yes, I know that multiline lambda will never be implemented in Python, but in many languages it is possible to write an anonymous function without using lambda at all.

In JavaScript:

Instead of "function <name>(<variables>){code}" you can write "var name; name=function(<variables>){code}"

Python (proposed):

def func(a,b):

    print(a+b)

    return a+b

becomes

func=function a,b:

    print(a+b)

    return a+b