Replace elements in array with class instances

Question

This is similar to this so please read it first to understand what I am trying to do.

Now, I want to make the replacement when I have class instances.Something like:

Answer 1

Make the replacement block like this. Also note this assumes your arr will be strictly in multiples of 5 and there will be as many blocks like b1,b2 etc as there are blocks in arr as given in the example.

for i,b_arr in enumerate(d):
    temp_arr = []
    for j in range(5):
        if j