# Write a Python program to Group similar elements into Matrix # Python3 code to demonstrate working of # Group similar elements into Matrix# Using list comprehension + groupby()from itertools import groupby  # initializing listtest_list = [1, 3, 5, 1, 3, 2, 5, 4, 2]  # printing original list print("The original list : " + str(test_list))  # Group similar elements into Matrix# Using list comprehension + groupby()res = [list(val) for key, val in groupby(sorted(test_list))]            # printing result print("Matrix after grouping : " + str(res))