title: How to get the range of valid Numpy data types?
body: <p>I'm interested in finding for a particular Numpy type (e.g. <code>np.int64</code>, <code>np.uint32</code>, <code>np.float32</code>, etc.) what the range of all possible valid values is (e.g. <code>np.int32</code> can store numbers up to <code>2**31-1</code>). Of course, I guess one can theoretically figure this out for each type, but is there a way to do this at run time to ensure more portable code?</p>