Always unwrap factor values before use due to unfortunate interactions with numpy arrays. #241
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…s with numpy arrays.
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Fixes: #232
I went down the rabbit hole a fair distance, but it looks like since both ObjectProxy and numpy array implementations are in C, that there is just some fundamental incompatibility with the numpy array constructors. We just unwrap them here in the few places that we actually require the ability to cast back to numpy arrays.