python 实现 ceiling divide 除法向上取整 (或小数向上取整)

向上取整的方法:

方法1:

items = 102
boxsize = 10
num_boxes = (items + boxsize - 1) // boxsize
方法2:

>>> -(-102 // 10)
11
方法3(浮点数向上取整):

from math import ceil
PRint(ceil(10.3))
11
或

import math
math.ceil( x )