The fingerprint range for x and y doesn't go to 1.

[drvinceknight]

Using np.arange for our coordinates means we don't necessarily get any coordinate at 1:

>>> np.arange(0, 1, .2)
array([ 0. ,  0.2,  0.4,  0.6,  0.8])

Given the definition by Ashlock (which defines this as an analytical function on the unit cube) I think it would be better to have coordinates at 0 and 1 (inclusive) with a setting for the granulatiry. Numpy has this:

>>> np.linspace(0, 1, 5)
array([ 0.  ,  0.25,  0.5 ,  0.75,  1.  ])

I should have noticed this on the PR.

Just pushing a PR that implements this change, I'm suggesting a change of parameter name there which is a pity given that I've also just pushed a release but perhaps that's ok...

[drvinceknight]

I'm about to push a better solution (or at least a solution that is less disruptive to the current api).