Revert "Update 49-Group-Anagrams.py"

Author: Ahmad-A0

49-Group-Anagrams.py

@@ -1,7 +1,10 @@
 class Solution:
     def groupAnagrams(self, strs: List[str]) -> List[List[str]]:
-        hashmap = defaultdict(list)
+        ans = collections.defaultdict(list)
+        
         for s in strs:
-            # keys can be strings, bcz they are immutable.
-            hashmap[str(sorted(s))].append(s) 
-        return hashmap.values()
+            count = [0] * 26
+            for c in s:
+                count[ord(c) - ord('a')] += 1
+            ans[tuple(count)].append(s)
+        return ans.values()