[Numpy-discussion] #2522 numpy.diff fails on unsigned integers

Hello, I want to bring up Issue #2522 'numpy.diff fails on unsigned integers (Trac #1929)' [1], as it was resonsible for an error in one of our programs. Short explanation of the bug: np.diff performs a subtraction on the input array. If this is of type uint and the data contains falling data,

Re: [Numpy-discussion] Proposal: add ndarray.keys() to return dtype.names

So, for non-structured arrays, the consens is an Exception. The question is, which one. AttributeError would be fully backwards compatible. Existing code checks for the method and if it exists, the object has fields. ValueError would make more sense, as the value - the array - is in wrong format/st