Added solution to leetcode 211

Leetcode problems/211-Design-Add-and-Search-Words-Data-Structure.py

@@ -0,0 +1,35 @@
+class Node:
+    def __init__(self):
+        self.children = {}
+        self.endOfWord = False
+class WordDictionary:
+
+    def __init__(self):
+        self.root = Node()
+
+    def addWord(self, word: str) -> None:
+        cur = self.root
+        for c in word:
+            if c not in cur.children:
+                cur.children[c] = Node()
+            cur = cur.children[c]
+        cur.endOfWord = True
+
+    def search(self, word: str, root = None) -> bool:
+        if root is None:
+            cur = self.root
+        else:
+            cur = root
+        for c in enumerate(word):
+            if c[1] == '.':
+                for k in cur.children.keys():
+                    if self.search(word[(c[0] + 1):], cur.children[k]):
+                        return True
+                return False
+
+            else:
+                if c[1] not in cur.children:
+                    return False
+                cur = cur.children[c[1]]
+        return cur.endOfWord
+