関連ワード:  how to get column in matrix python    how to get column in array python    how to get number of columns in matrix python    how to get columns in 2d array python    how to get number of columns in array python    how to select a column in array python    how to get first column of matrix in python    how to select a column in a matrix python    how to access column in matrix python    how to get row and column of matrix in python