​​向下取整​​

>>> a = 3.75
>>> int(a)
3

​​四舍五入​​

>>> a=3.25;b=3.75
>>> round(a);round(b)
3.0
4.0

​​向上取整​​

>>> import math
>>> math.ceil(3.25)
4.0
>>> math.ceil(3.75)
4.0