摘要： 1. Fall in Love with English爱上英语 Hiding behind the loose dusty curtain, a teenager packed up his overcoat into the suitcase. He planned to leave home 阅读全文

摘要： 舍弃小数部分 >>> math.trunc(12.533222) 12 >>> round(12.2544) 12 也可以： int(12.0)=12 按给定小数位数四舍五入 >>> round(12.2544, 3) 12.254 向上取整 >>> math.ceil(12.4584) 13 向下 阅读全文