How is this not pythonic? 

series.apply(x -> x**2)
Compared to.. 
series.apply(lambda x: x**2)


(x, y) -> x+y, () -> 0, (x) -> x**2 (for single parameter, we can write it without parenthesis like the example above) are pythonic enough to my eyes. 

Abdulla

On 17 Feb 2021, at 10:59 PM, Joao S. O. Bueno <jsbueno@python.org.br> wrote:

If someone comes with a "pythonic" way to lift restrictions on
lambda, that could be something for debate, but so far this is
just about uglifying it, and creating a new syntax matching
exactly what exists today.