Using "|" to merge dictionaries (which was possible in other ways before) instead of offering pipes as in bash and Elixir (a feature that's actually useful).
The “|” operator was already used for set unions and binary OR, so it’s a little late to reserve it for control flow. Personally I don’t mind having a “dict union” operator at all.
On the Python side, though, at least you can build your own pipes! You can define various helper classes that have, say, an `__rrshift__` method, to let you do the following with full type-checking support:
Like all of python, `a | b` operator is just `a.__or__(b)`. If you want that operator to do something different in a different context, just override __or__.
Nothing prevents you from defining the | operator for other user-defined types where that would actually make sense. A dictionary doesn't represent an ongoing process or stream. Lots of things are possible; that isn't a reason not to find better ways to do them (cf. Raymond Hettinger).
Any Lisp-ness comes from Elixir being a skin on Erlang, and so comes almost anything else good to say about Elixir. (And my comment was explicitly comparing Elixir to Erlang.)
The 'pipe' is hacky, for example, because it's just syntactic sugar that only works in one specific case, and not in general.
