append something to the 2 dim on an array in python code example

Example 1: python append to 2d array

temp_list = [[], [], [], []]
temp_list[0].append("a1")
temp_list[1].append("a2")
temp_list[2].append("a3")
temp_list[3].append("a4")

Example 2: python add item multidimensional list

a_2d_list = [[1, 2], [3, 4]]
a_2d_list.append([5, 6])