题目：
题解：
class Solution:def groupAnagrams(self, strs: List[str]) -> List[List[str]]:mp = collections.defaultdict(list)for st in strs:counts = [0] * 26for ch in st:counts[ord(ch) - ord("a")] += 1# 需要将 list 转换成 tuple 才能进行哈希mp[tuple(counts)].append(st)return list(mp.values())
