from dataclasses import dataclass, field

@dataclass(order=True, frozen=True)
class Character:
    sort_index: int = field(init=False, repr=False)
    name: str
    job: str
    age: int
    intelligence: int = 50

    def __post_init__(self):
        object.__setattr__(self, 'sortindex', self.intelligence)

Description:
using sortindex instead of sort_index gave the following suggestion: 

Current:
AttributeError: 'Character' object has no attribute 'sort_index'. Did you mean: 'sortindex'?


Expected: 
AttributeError: 'Character' object has no attribute 'sortindex'. Did you mean: 'sort_index'?