l = [[0, 5.1, 3.5, 1.4, 0.2], [0, 4.9, 3.0, 1.4, 0.2], [0, 4.7, 3.2, 1.3, 
    0.2], [1, 4.6, 3.1, 1.5, 0.2], [1, 5.0, 3.6, 1.4, 0.2], [1, 5.4, 3.9, 
    1.7, 0.4], [1, 4.6, 3.4, 1.4, 0.3]]
How can a Python list be sliced such that a column is moved to being a separate element column?