Integer division being used when dividing two dimensionless quantities.

[mdickinson]

There are some surprising results when doing divisions with dimensionless quantities.

>>> from scimath.units.SI import *
>>> dimensionless / dimensionless
1
>>> type(dimensionless / dimensionless)
<type 'int'>
>>> dimensionless / (2*dimensionless)
0

I'd expect float and 0.5, here.

I also find it surprising that a multiplication or division with a unitless result returns a scalar (int or float) rather than another scimath.units.unit.unit instance, but that's another issue.

[mdickinson]

So dimensionless.value is 1, which is part of the cause. Changing that feels a bit risky; I'd suggest that instead we change the division semantics so that values are divided using operator.truediv.