On Fri, Oct 26, 2018 at 7:12 PM, Travis Oliphant <teoliphant@gmail.com> wrote:
agree that we can stop bashing subclasses in general. The problem with numpy subclasses is that they were made without adherence to SOLID: https://en.wikipedia.org/wiki/SOLID. In particular the Liskov substitution principle: https://en.wikipedia.org/wiki/ Liskov_substitution_principle .
...
did not properly apply them in creating np.matrix which clearly violates the substitution principle.
So -- could a matrix subclass be made "properly"? or is that an example of something that should not have been a subclass? -CHB -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R (206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception Chris.Barker@noaa.gov