from fastapi import APIRouter
from pydantic import BaseModel

INDEX = "毛利率（%）"

router = APIRouter()


class Params(BaseModel):
    营业收入: float
    营业成本: float


@router.post("/{}".format(INDEX))
def func(p: Params):
    try:
        d = p.营业收入 - p.营业成本
        result = d / p.营业收入 * 100
        return round(result, 6)

    except ZeroDivisionError:
        return "算式无意义"
    except Exception:
        return "计算错误"