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37 def inorder(self): 38 self._inorder_recursive(self.head)
22 def _traversal(self, node, res): 23 if not node: 24 return 25 26 self._traversal(node.left, res) 27 res.append(node.val) 28 self._traversal(node.right, res)
2 def postorderTraversal(self, root): 3 if root is None: 4 return [] 5 return ( 6 self.postorderTraversal(root.left) 7 + self.postorderTraversal(root.right) 8 + [root.val] 9 )
40 def helper(root): 41 if root: 42 helper(root.left) 43 vals.append(root.val) 44 helper(root.right)
30 def preorder(self): 31 print(self.key) 32 if self.leftChild: 33 self.leftChild.preorder() 34 if self.rightChild: 35 self.rightChild.preorder()
297 def inorder_traverse(self): 298 299 result = [] 300 301 if not self.root: 302 return result 303 304 result.extend(self.root.left.inorder_traverse()) 305 result.append(self.root.contents) 306 result.extend(self.root.right.inorder_traverse()) 307 308 return result
64 def _print_in_order_traversal(self, x): 65 if x is not None: 66 self._print_in_order_traversal(x.left) 67 print(x.key, "-> ", end="") 68 self._print_in_order_traversal(x.right)
46 def recursive_inorder(self, root, ans): 47 if not root: 48 return 49 50 self.recursive_inorder(root.left, ans) 51 ans.append(root.val) 52 self.recursive_inorder(root.right, ans)
30 @staticmethod 31 def postorderTraversal(root, result = []): 32 result = [] 33 34 def helper(root, result): 35 if not root: 36 return 37 helper(root.left, result) 38 helper(root.right, result) 39 result.append(root.val) 40 41 helper(root, result) 42 return result
10 def inorderTraversal(self, root): 11 """ 12 :type root: TreeNode 13 :rtype: List[int] 14 """ 15 stack = [] 16 result = [] 17 while root or stack: 18 if root: 19 stack.append(root) 20 root = root.left 21 else: 22 node = stack.pop() 23 result.append(node.val) 24 root = node.right 25 return result