Python Double Colon (::) Syntaxcollection[start:stop:step]Also, from: https://d2l.ai/chapter_preliminaries/ndarray.htmlX[:2, :] = 12 X tensor([[12., 12., 12., 12.], [12., 12., 12., 12.], [ 8., 9., 10., 11.]]) Tags AI-ML Python concepts