関連ワード:  how to update a 2d array in python    how to create a 2d array in python    how to initialize a 2d array in python    how to declare a 2d array in python    how to define a 2d array in python    how to sort a 2d array in python    how to print a 2d array in python    how to write a 2d array in python    how to plot a 2d array in python    how to flatten a 2d array in python