Changed float division to integer division

[GodotMisogi]

Purpose

range() and np.zeros() in Python 3 throw errors as /3 returns a float, so //3 for integer division is done instead.

Type of change

• Bugfix
• Breaking change

Testing

Python 2

>>> xs = np.array([1,2,3,4,5,6])
>>> range(xs.size/3)
[0, 1]
>>> np.zeros(xs.size/3)
array([0., 0.])

Python 3

>>> import numpy as np
xs = np.array([1,2,3,4,5,6])
>>> range(xs.size/3)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'float' object cannot be interpreted as an integer
>>> np.zeros(xs.size/3)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'float' object cannot be interpreted as an integer
>>> np.zeros(xs.size//3)
array([0., 0.])
>>> range(xs.size//3)
range(0, 2)