Given an array of strings strs, group the anagrams together. You can return the answer in any order.
An Anagram is a word or phrase formed by rearranging the letters of a different word or phrase, typically using all the original letters exactly once.
Example 1:
Input: strs = ["eat","tea","tan","ate","nat","bat"]
Output: [["bat"],["nat","tan"],["ate","eat","tea"]]
Example 2:
Input: strs = [""]
Output: [[""]]
Example 3:
Input: strs = ["a"]
Output: [["a"]]
Solution
from collections import defaultdict
class Solution:
def groupAnagrams(self, strs: List[str]) -> List[List[str]]:
lookup = defaultdict(list)
for word in strs:
key = ''.join(sorted(list(word)))
lookup[key].append(word)
return [word for word in lookup.values()]