insert a new row to numpy array in especific position
>>> import numpy as np >>> a = np.zeros((2, 2)) >>> a array([[ 0., 0.], [ 0., 0.]]) # In the following line 1 is the index before which to insert, 0 is the axis. >>> np.insert(a, 1, np.array((1, 1)), 0) array([[ 0., 0.], [ 1., 1.], [ 0., 0.]]) >>> np.insert(a, 1, np.array((1, 1)), 1) array([[ 0., 1., 0.], [ 0., 1., 0.]])