python2精确除法

2019-10-15 18:28栏目:新闻资讯
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python2和python3除法的最大区别:

python2:

print 500/1000

python2结果:取整数部分,小数并没有保留

0

Process finished with exit code 0

 

python3:

print 500/1000

python3结果:得到真实结果,小数保留

0.5

Process finished with exit code 0

 

那么,如果python2想保留小数部分,要怎么做呢?

只需要增加一个导入包.就可以了.并不需要其它操作

from __future__ import division #用于/相除的时候,保留真实结果.小数

 

增加导入包后的,python2操作:

#coding:utf-8
from __future__ import division

print 500/1000

结果:

0.5

Process finished with exit code 0

 

还有另一种方式.将除数或被除数两个其它至少一个转换成float型:

print float(500)/1000

结果:

0.5

Process finished with exit code 0

 

 

 

 

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