Anagram Grouping using Hashing and Sorting

from collections import defaultdict

class Solution:
    def groupAnagrams(self, strs):
        # Initialize a defaultdict to store anagrams grouped by their sorted forms
        hashset = defaultdict(list)

        # Loop through each string in the input list
        for s in strs:
            # Sort the characters in the string and join them to form the sorted string
            sorted_str = ''.join(sorted(s))

            # Append the original string to the list associated with its sorted form
            hashset[sorted_str].append(s)

        # Return a list of grouped anagram lists
        return list(hashset.values())