splitting numeric list based on condition

[python_newbie09]

you are very helpful! thank you very much.

---

num_list = [0,1,2,3,4,5,1,2,3,4,5,2,3,4,5]
 
arrays = [[]] # array of sub-arrays

for i, num in enumerate(num_list):          # go through each element after the first
    arrays[-1].append(num)                  # Add it to the last sub-array
    if num == 5 and i != len(num_list)-1:   # if 5 encountered and not last element
        arrays.append([])
        
print(arrays)

Output:
[[0, 1, 2, 3, 4, 5], [1, 2, 3, 4, 5], [2, 3, 4, 5]]

import numpy as np
num_arr = np.array([0,1,2,3,4,5,1,2,3,4,5,2,3,4,5])
arrays = np.split(num_arr, np.where(num_arr[:-1] == 5)[0]+1)
print(arrays)

Output:
[array([0, 1, 2, 3, 4, 5]), array([1, 2, 3, 4, 5]), array([2, 3, 4, 5])]

btw, could explain what is actually happening in this line of code, especially the last part [0]+1

arrays = np.split(num_arr, np.where(num_arr[:-1] == 5)[0]+1)