You have to first initialize the outer list with lists before adding items; Python calls this "list comprehension". # Creates a list containing 5 lists, each of ... ... <看更多>

You can create a two dimensional array by applying np.array() to a list of lists, as long as the sublists are of the same size, and contain elements of a single ... ... <看更多>

I have a 2D Python array (list of lists). I treat this as a 'table'. Now I want to replace the first row and the top row with a header row ... ... <看更多>