## Making python 2 and 3 compatible:

Import above everything

from future import print_function

All print statements have to have brackets, like

print("sint")

Exceptions need to be in brackets as well

raise ValueError("dodgy value")

Integer division

####python 2 currently rounds down, i.e. 2/3==0 not 0.66, while python 3 does true division ####rounding down in both python 2 and 3 is 2//3, thus with two slashes ####to run true division in python 2 and 3 from future import division # (at top of module)

and then use simply one slashassert 3 / 2 == 1.5

so far I have circumvented this problem by using a dot after integer (e.g. 2. instead of 2). So maybe try and fix this

Imports relative to a package

####Suppose the package is: mypackage/ init.py submodule1.py submodule2.py ####and the code below is in submodule1.py:

Python 2 only:

import submodule2

Python 2 and 3:

from . import submodule2

Change all ranges to list(range) as otherwise it will use the range from python3