Integer division and the __future__
from __future__ import print_function print(3/2)
$ python divide.py 1 $ python3 divide.py 1.5
from __future__ import print_function from __future__ import division print(3/2) # 1.5
If you need to use Python 2, remember that by default division is integer based so 3/2 would return 1. Importing the 'division' directive from __future__ changes this to the behavior that we usually expect 3/2 being 1.5. This is also the behavior we have in Python 3. In case you already use Python 3 and would like to get the "old" behavior, that is to get the integer part of the division, you can always call the "int" function: int(b/a).