OHHH. Looking at the Infix class carefully I realize it's not actually |add| as a single operator but using the right or __ror__ to partially apply the function

OHHH. Looking at the Infix class carefully I realize it's not actually |add| as a single operator but using the right or __ror__ to partially apply the function, then using the left or __or__ to fully apply it. Wrapping it up in a decorator class is really neat!