how to create an empty numpy array and append code example

Example 1: create an empty numpy array and append

combined_array = np.append(empty_array, to_append)

Example 2: numpy create empty array

>>> np.empty([2, 2])
array([[ -9.74499359e+001,   6.69583040e-309],
       [  2.13182611e-314,   3.06959433e-309]])         #uninitialized

Example 3: create empty numpy array

>>> np.empty([2, 2])
#Output:
array([[ -9.74499359e+001,   6.69583040e-309],
       [  2.13182611e-314,   3.06959433e-309]])