Selecting a column vector from a matrix in Python

I would like to index a column vector in a matrix in Python/numpy and have it returned as a column vector and not a 1D array.

x = np.array([[1,2],[3,4]])
x[:,1]
>array([2, 4])

np.transpose(x[:,1]) is not a solution. Following the numpy.transpose documentation, this will return a row vector (1-D array).

Few options -

x[:,[1]]
x[:,None,1]
x[:,1,None]
x[:,1][:,None]
x[:,1].reshape(-1,1)
x[None,:,1].T