Python is convenient and flexible, yet notably slower than other languages for raw computational speed. The Python ecosystem has compensated with tools that make crunching numbers at scale in Python ...

When accessing the element on the ith row and jth column in a 2D array x, you would use x[i, j] in C style arrays and x[j, i] in Fortran style arrays. Going back to NumPy, you can select range of rows ...

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