python2和python3除法的最大區別:

python2:

print 500/1000

python2結果:取整數部分,小數并沒有保留

0

Process finished with exit code 0

python3:

print 500/1000

python3結果:得到真實結果,小數保留

0.5

Process finished with exit code 0

那么,如果python2想保留小數部分,要怎么做呢?

只需要增加一個導入包.就可以了.并不需要其它操作

from __future__ import division #用于/相除的時候,保留真實結果.小數

增加導入包后的,python2操作:

#coding:utf-8
from __future__ import division

print 500/1000

結果:

0.5

Process finished with exit code 0

還有另一種方式.將除數或被除數兩個其它至少一個轉換成float型:

print float(500)/1000

結果:

0.5

Process finished with exit code 0

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