Update 0205.同构字符串.md

problems/0205.同构字符串.md

@@ -90,6 +90,24 @@ class Solution {
 ## Python
 
 ```python
+class Solution:
+    def isIsomorphic(self, s: str, t: str) -> bool:
+        default_dict1 = defaultdict(str)
+        default_dict2 = defaultdict(str)
+    
+        if len(s) != len(t): return false
+
+        for i in range(len(s)):
+            if not default_dict1[s[i]]:
+                default_dict1[s[i]] = t[i]
+            
+            if not default_dict2[t[i]]:
+                default_dict2[t[i]] = s[i]
+
+            if default_dict1[s[i]] != t[i] or default_dict2[t[i]] != s[i]:
+                return False
+            
+        return True
 ```
 
 ## Go