python:实现prefix conversions前缀转换算法
from __future__ import annotations
from enum import Enum
class SI_Unit(Enum):
yotta = 24
zetta = 21
exa = 18
peta =
from __future__ import annotations
from enum import Enum
class SI_Unit(Enum):
yotta = 24
zetta = 21
exa = 18
peta =