Unsuccessful append to an empty NumPy array

Question

I am trying to fill an empty(not np.empty!) array with values using append but I am gettin error:

My code is as follows:

import numpy as np
result=np         


        

Answer 1

This error arise from the fact that you are trying to define an object of shape (0,) as an object of shape (2,). If you append what you want without forcing it to be equal to result[0] there is no any issue:

b = np.append([result[0]], [1,2])

But when you define result[0] = b you are equating objects of different shapes, and you can not do this. What are you trying to do?