正常品与劣等品判断

def solve(income_elasticities):
    result = {}
    for good, em in income_elasticities.items():
        if em > 1:
            result[good] = "奢侈品"
        elif em > 0:
            result[good] = "必需品"
        else:
            result[good] = "劣等品"
    return {"收入弹性": income_elasticities, "商品分类": result}