Append a numpy.array to a certain numpy.array stored in a list

Question

I have been for hours strugling to understand why i am not able to do this:

>>> import numpy as np
>>> a = [np.empty((0,78,3)) for i in range(         


        

Answer 1

Your're not appending b but [b]. That doesn't work.

So in order to append b, use

a[0] = np.append(a[0],b,axis=0)