Function add_operators 

pub fn add_operators(
    class: &'static Py<PyType>,
    ctx: &Context,
    attr_docs: &[(&str, u32, u32)],
)

Add slot wrapper descriptors to a type’s dict

Iterates SLOT_DEFS and creates a PyWrapper for each slot that:

1. Has a function set in the type’s slots
2. Doesn’t already have an attribute in the type’s dict