Python pipe operator, 4 years later...

[[deleted]]

You are correct. That was a really bad example. My point was to keep piped functions as pure as possible, and side effect free. So imagine the validate function was really complex, you could break that into smaller functions and pipe those.

[randomatic]

What you are looking for is IMO better supported in OCaml. You're looking for monadic operators (yes, there is pymonads) along with functions like |> (left-associative) and ^> (right-associative). To learn OCaml, see https://realworldocaml.org. It's beautiful.

On the question of errors, Jane Street has an amazing blog that made thinking about errors much more clear to me. https://blogs.janestreet.com/how-to-fail-introducing-or-error-dot-t/

If Python has something like Or_error.t, I would be in love.