I posted this to LWN, and thought I'd share it here too:
I'm opposed to terse-ifying lambda in Python.
Lambda is rarely useful in Python - you're almost always better off using a generator expression, a list comprehension, or something from the operator module.
And lambdas tend to give rise to the software development equivalent of a runon sentence.
Naming a function in those rare cases that you genuinely need something custom really isn't the end of the world, and is more readable anyway.