Update 0383.赎金信.md

problems/0383.赎金信.md

@@ -136,7 +136,34 @@ class Solution {
 ```
 
 Python：
+```
+class Solution(object):
+    def canConstruct(self, ransomNote, magazine):
+        """
+        :type ransomNote: str
+        :type magazine: str
+        :rtype: bool
+        """
         
+        # use a dict to store the number of letter occurance in ransomNote
+        hashmap = dict()
+        for s in ransomNote:
+            if s in hashmap:
+                hashmap[s] += 1
+            else:
+                hashmap[s] = 1
+        
+        # check if the letter we need can be found in magazine
+        for l in magazine:
+            if l in hashmap:
+                hashmap[l] -= 1
+        
+        for key in hashmap:
+            if hashmap[key] > 0:
+                return False
+        
+        return True
+```
 
 Go：