initial commit

Prog_2A/lab_10/bin_tree.py

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+class Node:
+    def __init__(self, data):
+        self.data = data
+        self.visited = False
+        self.left = None
+        self.right = None
+
+    def __str__(self):
+        return self.data
+    def __repr__(self):
+        return self.__str__()
+
+def traverse (node, stack = None):
+    if stack is None:
+        stack = []
+
+    if node.left and node.left.visited == False:
+        stack.append(node.left)
+        print(node.left.data)
+        node.left.visited = True
+        traverse(node.left)
+
+    if node.right and node.right.visited == False:
+        stack.append(node.right)
+        print(node.right.data)
+        node.right.visited = True
+        traverse(node.right)
+
+    else :
+        if len(stack) > 0:
+            traverse(stack[len(stack)-1])
+            stack.pop()
+
+root = Node(6)
+node_two = Node(2)
+node_seven = Node(7)
+node_one = Node(1)
+node_four = Node(4)
+node_three = Node(3)
+node_five = Node(5)
+node_six = Node(6)
+node_nine = Node(9)
+
+
+root.left = node_two
+root.right = node_seven
+
+node_two.left = node_one
+node_one.right = node_four
+
+node_four.right = node_three
+node_three.right = node_five
+
+node_seven.left = node_six
+node_six.right = node_nine
+
+traverse(root)