Should datasets/spectra also work with non numpy array.

[ajasja]

Right now if a non- np.ndarray somehow gets into a Dataset an exception is raised when doing addition/subtraction.

this is because

a = [1,2,3]
a == a

returns True, but

anp = np.array(a)
anp == anp

returns array([ True, True, True], dtype=bool)

I temporarily solved this by writing a make_numpy_array function that returns a np.ndarray.
Perhaps we should solve this also in another way, by replacing the code any(x == y) with something that can handle both array and ndarray.

[ajasja]

Ahh, there is
http://docs.scipy.org/doc/numpy/reference/generated/numpy.array_equal.html, which should work for both arrays and numpy arrays

[ajasja]

In the test all(x == y) should be replaced with np.array_equal and we're good to go.

[ajasja]

Hmm another difference between array and ndarray.

a = np.array([1, 2, 3])
b = 2*a
>>> [2, 4, 6]

a = [1, 2, 3]
>>>[1, 2, 3, 1, 2, 3]