This is a godot engine issue: All parameters have to be passed in order.

Some of the more complex numpy functions have 8 or so parameters. It would be ridiculous to call them by name, and even for the smaller ones, it may be annoying to keep track of default values.

This one is likely unsolvable without bigger support for godotengine/godot-proposals#902 / godotengine/godot#6866.