python show all arrays that contains 1-4 code example

Example 1: how do i print the entire array pthon jupyter

with numpy.printoptions(threshold=numpy.inf):
    print(arr)

Example 2: how to get the first few lines of an ndarray

In [11]: a[:,:2]
Out[11]: 
array([[-0.57098887, -0.4274751 ],
       [-0.22279713, -0.51723555],
       [ 0.67492385, -0.69294472],
       [ 0.41086611,  0.26374238]])