my_data = np.genfromtxt('data.csv', delimiter=',') # read the data
X = my_data[:, 0].reshape(-1,1) # -1 tells numpy to figure out the dimension by itself
ones = np.ones([X.shape[0], 1]) # create a array containing only ones
X = np.concatenate([ones, X],1) # cocatenate the ones to X matrix
y = my_data[:, 1].reshape(-1,1) # create the y matrix