How to print a column of a matrix(2D list) in python without a loop?

To print the 2nd row I do like this
print(coeff_matrix[2])

to my surprise
print(coeff_matrix[:][2])
prints the 2nd row as well , not the 2nd column as I was expecting.
Why is it so and what is the correct way to print 2nd column.

>Solution :

Convert coefficient_matrix to a numpy array and use slicing:

import numpy as np
a = np.array([[1,2,3], [4, 5, 6], [7,8, 9]])
a[:,1]

Output:

array([2, 5, 8])

If numpy is not available, you can use zip:

a = [[1,2,3], [4, 5, 6], [7,8, 9]]
list(zip(*a))[1]

Output:

(2, 5, 8)

Or list comprehension (if that counts as without a loop?):

[i[1] for i in a]

Output:

[2, 5, 8]