python - Why is the array in the list not getting bigger? -

i trying append numpy.arrays numpy.array of numpy.arrays, reason dimension supposed increase in not increasing.

i made prior post same list of of numpy.arrays, worked, since using way more numpy.ndarrays 1 in example, converted list numpy.arrays make bit faster - container has shape (72,0,78,3).

example:

import numpy np  nano_train_input = [] in range(974):     nano_train_input.append(np.random.random((78,72,3)))  input_train = np.array([np.empty((0,78,3)) in range(72)])  print input_train.shape raw_input("sadasd...") #print nano_train_input.shape = 0 j = 0 train in nano_train_input:     row in train.reshape(72,78,3):         #print row.reshape(1,78,3).shape         input_train[i]= np.concatenate((input_train[i],row.reshape(1,78,3)),axis=0)         = i+1         print input_train[0].shape     i=0  print input_train[0].shape 

problem after concatenate input_train[0].shape still (0,78,3) , not desired (974,78,3)... how fix that?

i intend on converting input_train list, should possible numpy.tolist()