When giving numbers, like array[0, 0], Python treats 0, 0 as a tuple. But I'm confused how array[:, 0] is not a syntax error. I can't think of a case where a colon followed by a comma is valid in python outside of NumPy. I had a few ideas on tricks NumPy may be using, but they were all wrong: , 0), [:, 0], {:, 0} and :, 0 are all invalid Python : and , can't be used as variable names. : and , aren't operators that could be overloaded. It's not python's [start:stop:step] slicing syntax with some trick to allow the comma, because it couldn't explain the 3rd colon in array[:, :, :] I'm stumped on how this syntax works. How is Python parsing it? Continue reading...
