如何将字母异位词组合在一起

from collections import defaultdict
def group_anagrams(strs):
    anagrams = defaultdict(list)
    
    for s in strs:
        # Sort the string and use it as the key
        sorted_str = ''.join(sorted(s))
        # Append the original string to the list of its sorted key
        anagrams[sorted_str].append(s)
    
    # Return the values of the dictionary as a list of lists
    return list(anagrams.values())
# 示例1
strs1 = ["eat", "tea", "tan", "ate", "nat", "bat"]
print(group_anagrams(strs1))  # 输出: [["bat"],["nat","tan"],["ate","eat","tea"]]
# 示例2
strs2 = [""]
print(group_anagrams(strs2))  # 输出: [[""]]
# 示例3
strs3 = ["a"]
print(group_anagrams(strs3))  # 输出: [["a"]]