trees organized

src/trees/binary_search_tree.py

@@ -1,73 +1,103 @@
 #!/usr/bin/python
 
-__author__ = "Mari Wahl"
+__author__ = "bt3"
-__email__ = "marina.w4hl@gmail.com"
 
 
-from binary_tree import NodeBT, BinaryTree
+class Node(object):
 
+    def __init__(self, item=None,):
 
-class NodeBST(NodeBT):
-
-    def __init__(self, item=None, level=0):
         self.item = item
-        self.level = level
         self.left = None
         self.right = None
 
+    def __repr__(self):
+        return '{}'.format(self.item)
+
+
+    def _add(self, value):
+        new_node = Node(value)
 
-    def _addNextNode(self, value, level_here=1):
-        new_node = NodeBST(value, level_here)
         if not self.item:
             self.item = new_node
+
         else:
             if value > self.item:
-                self.right = self.right and self.right._addNextNode(value, level_here+1) or new_node
+                self.right = self.right and self.right._add(value) or new_node
             elif value < self.item:
-                self.left = self.left and self.left._addNextNode(value, level_here+1) or new_node
+                self.left = self.left and self.left._add(value) or new_node
             else:
                 print("BSTs do not support repeated items.")
+
         return self # this is necessary!!!
 
 
-
+    def _search(self, value):
-    def _searchForNode(self, value):
         if self.item == value:
-            return self
+            return True # or self
+
         elif self.left and value < self.item:
-                return self.left._searchForNode(value)
+                return self.left._search(value)
+
         elif self.right and value > self.item:
-                return self.right._searchForNode(value)
+                return self.right._search(value)
+
         else:
             return False
 
 
+    def _isLeaf(self):
+        return not self.right and not self.left
 
-class BinarySearchTree(BinaryTree):
+
+    def _printPreorder(self):
+        print self.item
+
+        if self.left:
+            return self.left._printPreorder()
+
+        if self.right:
+            return self.right._printPreorder()
+
+
+
+class BST(object):
 
     def __init__(self):
         self.root = None
 
-    def addNode(self, value):
+    def add(self, value):
         if not self.root:
-            self.root = NodeBST(value)
+            self.root = Node(value)
         else:
-            self.root._addNextNode(value)
+            self.root._add(value)
 
+    def printPreorder(self):
+        if self.root:
+            self.root._printPreorder()
+
+    def search(self, value):
+        if self.root:
+            return self.root._search(value)
 
 
 
 if __name__ == '__main__':
-    bst = BinarySearchTree()
+
+    bst = BST()
     print "Adding nodes 1 to 10 in the tree..."
-    for i in range(1, 10):
+    for i in range(1, 11):
-        bst.addNode(i)
+        bst.add(i)
-    print "Is 8 a leaf? ", bst.isLeaf(8)
+
-    print "Whats the level of node 8? ", bst.getNodeLevel(8)
+    print
-    print "Is node 10 a root? ", bst.isRoot(10)
+    print "Searching for nodes 16 and 6"
-    print "Is node 1 a root? ", bst.isRoot(1)
+    print bst.search(16)
-    print "Whats the tree height? ", bst.getHeight()
+    print bst.search(6)
-    print "Is this tree BST? ", bst.isBST()
+
-    print "Is this tree balanced? ", bst.isBalanced()
+    print
+    print "Printing preorder..."
+    bst.printPreorder()
+
+
 
 

src/trees/binary_tree.py

@@ -1,43 +1,23 @@
 #!/usr/bin/python
 
-__author__ = "Mari Wahl"
+__author__ = "bt3"
-__email__ = "marina.w4hl@gmail.com"
 
 
+class Node(object):
 
-''' Implementation of a binary tree and its properties. For example, the following bt:
+    def __init__(self, item=None,):
 
-                               1                ---> level 0
-                        2             3         ---> level 1
-                  4         5                   ---> level 2
-              6      7                          ---> level 3
-            8   9                               ---> level 4
-
-    has the following properties:
-
-        - SIZE OR NUMBER OF NODES: n = 9
-        - NUMBER OF BRANCHES OR INTERNAL NODES: b = n-1 = 8
-        - VALUE OF ROOT = 1
-        - MAX_DEPTH OR HEIGHT: h = 4
-        - IS BALANCED? NO
-        - IS BST? NO
-'''
-
-
-class NodeBT(object):
-    def __init__(self, item=None, level=0):
         self.item = item
-        self.level = level
         self.left = None
         self.right = None
 
-
     def __repr__(self):
         return '{}'.format(self.item)
 
 
-    def _addNextNode(self, value, level_here=1):
+    def _add(self, value):
-        new_node = NodeBT(value, level_here)
+        new_node = Node(value)
+
         if not self.item:
             self.item = new_node
         elif not self.left:
@@ -45,19 +25,21 @@ class NodeBT(object):
         elif not self.right:
             self.right = new_node
         else:
-            self.left = self.left._addNextNode(value, level_here+1)
+            self.left = self.left._add(value)
-        return self ## this is important, because the node return to the main
-
-
-    def _searchForNode(self, value):
-        if self.item == value:
         return self
-        else:
+
-            found = None
+
+    def _search(self, value):
+        if self.item == value:
+            return True # or self
+
+        found = False # or False, thats diff from BST
         if self.left:
-                found = self.left._searchForNode(value)
+            found = self.left._search(value)
+
         if self.right:
-                found =  found or self.right._searchForNode(value)
+            found =  found or self.right._search(value)
+
         return found
 
 
@@ -65,142 +47,71 @@ class NodeBT(object):
         return not self.right and not self.left
 
 
-    def _getMaxHeight(self):
-        ''' Get the max height at the node, O(n)'''
-        levelr, levell = 0, 0
-        if self.right:
-            levelr = self.right._getMaxHeight() + 1
-        if self.left:
-            levell = self.left._getMaxHeight() + 1
-        return max(levelr, levell)
 
-
+class BT(object):
-    def _getMinHeight(self, level=0):
-        ''' Get the min height at the node, O(n)'''
-        levelr, levell = -1, -1
-        if self.right:
-            levelr = self.right._getMinHeight(level +1)
-        if self.left:
-            levell = self.left._getMinHeight(level +1)
-        return min(levelr, levell) + 1
-
-
-    def _isBalanced(self):
-        ''' Find whether the tree is balanced, by calculating heights first, O(n2) '''
-        if self._getMaxHeight() - self._getMinHeight() < 2:
-            return False
-        else:
-            if self._isLeaf():
-                return True
-            elif self.left and self.right:
-                return self.left._isBalanced() and   self.right._isBalanced()
-            elif not self.left and self.right:
-                return  self.right._isBalanced()
-            elif not self.right and self.left:
-                 return  self.left._isBalanced()
-
-    def _isBST(self, mintree=None, maxtree=None):
-        ''' Find whether the tree is a BST, inorder '''
-        if self.item:
-            if not mintree:
-                mintree = self.item
-            if not maxtree:
-                maxtree = self.item
-
-            if self._isLeaf():
-                return True
-            elif self.left:
-                if self.left.item < self.item and mintree > self.left.item:
-                    mintree = self.left.item
-                    return self.left._isBST(mintree, maxtree)
-                else:
-                    return False
-            elif self.right:
-                if self.right.item > self.item and maxtree < self.right.item:
-                    maxtree = self.right.item
-                    return self.right._isBST(mintree, maxtree)
-                else:
-                    return False
-        else:
-            print('Tree is empty')
-
-
-
-
-
-
-
-
-class BinaryTree(object):
 
     def __init__(self):
         self.root = None
 
 
-    def addNode(self, value):
+    def add(self, value):
         if not self.root:
-            self.root = NodeBT(value)
+            self.root = Node(value)
         else:
-            self.root._addNextNode(value)
+            self.root._add(value)
 
 
-    def isLeaf(self, value):
+    def printPreorder(self):
-        node = self.root._searchForNode(value)
-        if node:
-            return node._isLeaf()
-        else:
-            print "Node not found."
-
-
-    def getNodeLevel(self, item):
-        node = self.root._searchForNode(item)
-        if node:
-            return node.level
-        else:
-            print('Node not found')
-
-
-    def isRoot(self, value):
-        return self.root.item == value
-
-
-    def getHeight(self):
-        return self.root._getMaxHeight()
-
-
-    def isBalanced(self):
-        return self.root._isBalanced()
-
-
-    def isBST(self):
-        return self.root._isBST()
-
-
-    def preorder(self):
         current = self.root
         nodes, stack = [], []
         while stack or current:
             if current:
-                nodes.append(current.item) # thats what change
+                nodes.append(current.item) # this is what change
                 stack.append(current)
                 current = current.left
             else:
                 current = stack.pop()
                 current = current.right
-        return nodes
+        print nodes
+
+
+    def printInorder(self):
+        current = self.root
+        nodes, stack = [], []
+        while stack or current:
+
+            if current:
+                stack.append(current)
+                current = current.left
+            else:
+                current = stack.pop()
+                nodes.append(current.item) # this is what change
+                current = current.right
+        print nodes
+
+
+    def search(self, value):
+        if self.root:
+            return self.root._search(value)
+
 
 
 
 if __name__ == '__main__':
-    bt = BinaryTree()
+
+    bt = BT()
     print "Adding nodes 1 to 10 in the tree..."
-    for i in range(1, 10):
+    for i in range(1, 11):
-        bt.addNode(i)
+        bt.add(i)
-    print "Is 8 a leaf? ", bt.isLeaf(8)
+
-    print "Whats the level of node 8? ", bt.getNodeLevel(8)
+    print
-    print "Is node 10 a root? ", bt.isRoot(10)
+    print "Searching for nodes 16 and 6"
-    print "Is node 1 a root? ", bt.isRoot(1)
+    print bt.search(16)
-    print "Whats the tree height? ", bt.getHeight()
+    print bt.search(6)
-    print "Is this tree BST? ", bt.isBST()
+
-    print "Is this tree balanced? ", bt.isBalanced()
+    print
-    print (bt.preorder())
+    print "Printing preorder..."
+    bt.printPreorder()
+
+    print "Printing Inorder..."
+    bt.printInorder()

src/trees/bunchclass.py

@@ -1,7 +1,6 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 
-__author__ = "Mari Wahl"
+__author__ = "bt3"
-__email__ = "marina.w4hl@gmail.com"
 
 class BunchClass(dict):
     def __init__(self, *args, **kwds):

src/trees/check_ancestor.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python
+
+__author__ = "bt3"
+
+
+from binary_search_tree import BST, Node
+from transversal import inorder
+
+def find_ancestor(path, low_value, high_value):
+
+    while path:
+        current_value = path[0]
+
+        if current_value < low_value:
+            try:
+                path = path[2:]
+            except:
+                return current_value
+
+        elif current_value > high_value:
+            try:
+                path = path[1:]
+            except:
+                return current_value
+
+        elif low_value <= current_value <= high_value:
+            return current_value
+
+
+if __name__ == '__main__':
+
+
+    bst = BST()
+    l = [10, 5, 6, 3, 8, 2, 1, 11, 9, 4]
+    for i in l:
+        bst.add(i)
+    nodes = inorder(bst.root)
+    print 'Original:    ', l
+    print 'Inorder:     ', nodes
+    print 'Ancestor for 3, 11:', find_ancestor(nodes, 3, 11)

src/trees/check_if_balanced.py

@@ -1,5 +1,6 @@
-__author__ = "bt3"
+#!/usr/bin/env python
 
+__author__ = "bt3"
 
 from binary_search_tree import BST, Node
 from binary_tree import BT, Node

src/trees/check_if_bst.py

@@ -1,3 +1,5 @@
+#!/usr/bin/env python
+
 __author__ = "bt3"
 
 

src/trees/simple_tree.py

@@ -1,11 +1,12 @@
-#!/usr/bin/python
+#!/usr/bin/env python
+
+__author__ = "bt3"
 
-__author__ = "Mari Wahl"
-__email__ = "marina.w4hl@gmail.com"
 
 """ A class for a simple tree """
 
 class SimpleTree(object):
+
     def __init__(self, value=None, children = None):
         self.value = value
         self.children = children

src/trees/transversal.py

@@ -0,0 +1,89 @@
+#!/usr/bin/env python
+
+__author__ = "bt3"
+
+
+from collections import deque
+from binary_search_tree import BST, Node
+from binary_tree import BT, Node
+
+
+def BFT(tree):
+    current = tree.root
+    nodes = []
+    queue = deque()
+    queue.append(current)
+
+    while queue:
+        current = queue.popleft()
+        nodes.append(current.item)
+        if current.left:
+            queue.append(current.left)
+        if current.right:
+            queue.append(current.right)
+
+    return nodes
+
+
+def preorder(tree, nodes=None):
+    nodes = nodes or []
+    if tree:
+        nodes.append(tree.item)
+        if tree.left:
+            preorder(tree.left, nodes)
+        if tree.right:
+            preorder(tree.right, nodes)
+    return nodes
+
+
+def postorder(tree, nodes=None):
+    nodes = nodes or []
+    if tree:
+        if tree.left:
+            nodes = postorder(tree.left, nodes)
+        if tree.right:
+            nodes = postorder(tree.right, nodes)
+        nodes.append(tree.item)
+
+    return nodes
+
+
+def inorder(tree, nodes=None):
+    nodes = nodes or []
+    if tree:
+        if tree.left:
+            nodes = inorder(tree.left, nodes)
+        nodes.append(tree.item)
+        if tree.right:
+            nodes = inorder(tree.right, nodes)
+    return nodes
+
+
+if __name__ == '__main__':
+
+
+    # bt
+    bt = BT()
+    l = [10, 5, 6, 3, 8, 2, 1, 11, 9, 4]
+    for i in l:
+        bt.add(i)
+    print 'BT...'
+    print 'Original:    ', l
+    print 'Preorder:    ', preorder(bt.root)
+    print 'Postorder:   ', postorder(bt.root)
+    print 'Inorder:     ', inorder(bt.root)
+    print 'Breath:      ', BFT(bt)
+
+    # bst
+    bst = BST()
+    l = [10, 5, 6, 3, 8, 2, 1, 11, 9, 4]
+    for i in l:
+        bst.add(i)
+
+    print
+    print 'BST ...'
+    print 'Original:    ', l
+    print 'Preorder:    ', preorder(bst.root)
+    print 'Postorder:   ', postorder(bst.root)
+    print 'Inorder:     ', inorder(bst.root)
+    print 'Breath:      ', BFT(bst)

src/trees/transversal_BST_ancestor.py

@@ -1,44 +0,0 @@
-#!/usr/bin/python
-
-__author__ = "Mari Wahl"
-__email__ = "marina.w4hl@gmail.com"
-
-''' find the lowest ancestor in a BST '''
-
-from transversal_BST_recursively import BSTwithTransversalRecursively
-
-
-
-def find_ancestor(path, low_value, high_value):
-    while path:
-        current_value = path[0]
-        if current_value < low_value:
-            try:
-                path = path[2:]
-            except:
-                return current_value
-        elif current_value > high_value:
-            try:
-                path = path[1:]
-            except:
-                return current_value
-        elif low_value <= current_value <= high_value:
-            return current_value
-        else:
-            return None # this is probably never touched
-
-
-
-
-if __name__ == '__main__':
-    bst = BSTwithTransversalRecursively()
-    l = [10, 5, 15, 1, 6, 11, 50]
-    for i in l:
-        bst.addNode(i)
-    path = bst.preorder()
-    print("The path inorder: ", path)
-
-    print("The path between 1 and 6 is :", find_ancestor(path, 1, 6))
-    print("The path between 1 and 11 is: ", find_ancestor(path, 1, 11))
-    print("The path between 11 and 50 is: ", find_ancestor(path, 11, 50))
-    print("The path between 5 and 15 is: ", find_ancestor(path, 5, 15))

src/trees/transversal_BST_iteratively.py

@@ -1,91 +0,0 @@
-#!/usr/bin/python
-
-__author__ = "Mari Wahl"
-__email__ = "marina.w4hl@gmail.com"
-
-
-from collections import deque
-from binary_search_tree import BinarySearchTree, NodeBST
-
-
-
-class BSTwithTransversalIterative(BinarySearchTree):
-
-    def inorder(self):
-        current = self.root
-        nodes, stack = [], []
-        while stack or current:
-            if current:
-                stack.append(current)
-                current = current.left
-            else:
-                current = stack.pop()
-                nodes.append(current.item) # thats what change
-                current = current.right
-        return nodes
-
-
-    def preorder(self):
-        current = self.root
-        nodes, stack = [], []
-        while stack or current:
-            if current:
-                nodes.append(current.item) # thats what change
-                stack.append(current)
-                current = current.left
-            else:
-                current = stack.pop()
-                current = current.right
-        return nodes
-
-
-    def preorder2(self):
-        nodes = []
-        stack = [self.root]
-        while stack:
-            current = stack.pop()
-            if current:
-                nodes.append(current.item)
-                stack.append(current.right)
-                stack.append(current.left)
-        return nodes
-
-
-    def BFT(self):
-        current = self.root
-        nodes = []
-        queue = deque()
-        queue.append(current)
-        while queue:
-            current = queue.popleft()
-            nodes.append(current.item)
-            if current.left:
-                queue.append(current.left) # LEFT FIRST!
-            if current.right:
-                queue.append(current.right)
-        return nodes
-
-
-
-
-
-
-if __name__ == '__main__':
-
-    bst = BSTwithTransversalIterative()
-    l = [10, 5, 6, 3, 8, 2, 1, 11, 9, 4]
-    for i in l:
-        bst.addNode(i)
-
-    print "Is 8 a leaf? ", bst.isLeaf(8)
-    print "Whats the level of node 8? ", bst.getNodeLevel(8)
-    print "Is node 10 a root? ", bst.isRoot(10)
-    print "Is node 1 a root? ", bst.isRoot(1)
-    print "Whats the tree height? ", bst.getHeight()
-    print "Is this tree BST? ", bst.isBST()
-    print "Is this tree balanced? ", bst.isBalanced()
-
-    print("Pre-order I: ", bst.preorder())
-    print("Pre-order II: ", bst.preorder2())
-    print("In-order: ", bst.inorder())
-    print("BFT: ", bst.BFT())

src/trees/transversal_BST_recursively.py

@@ -1,88 +0,0 @@
-#!/usr/bin/python
-
-__author__ = "Mari Wahl"
-__email__ = "marina.w4hl@gmail.com"
-
-
-from binary_search_tree import BinarySearchTree, NodeBST
-
-
-
-class BSTwithTransversalRecursively(BinarySearchTree):
-
-    def __init__(self):
-        self.root = None
-        self.nodes_BFS = []
-        self.nodes_pre = []
-        self.nodes_post = []
-        self.nodes_in = []
-
-    def BFT(self):
-        self.root.level = 0
-        queue = [self.root]
-        current_level = self.root.level
-
-        while len(queue) > 0:
-            current_node = queue.pop(0)
-            if current_node.level > current_level:
-                current_level += 1
-            self.nodes_BFS.append(current_node.item)
-
-            if current_node.left:
-                current_node.left.level = current_level + 1
-                queue.append(current_node.left)
-
-            if current_node.right:
-                current_node.right.level = current_level + 1
-                queue.append(current_node.right)
-
-        return self.nodes_BFS
-
-    def inorder(self, node=None, level=0):
-        if not node and level == 0:
-            node = self.root
-        if node:
-            self.inorder(node.left,  level+1)
-            self.nodes_in.append(node.item)
-            self.inorder(node.right, level+1)
-        return self.nodes_in
-
-    def preorder(self, node=None, level=0):
-        if not node and level == 0:
-            node = self.root
-        if node:
-            self.nodes_pre.append(node.item)
-            self.preorder(node.left, level+1)
-            self.preorder(node.right, level+1)
-        return self.nodes_pre
-
-    def postorder(self, node=None, level=0):
-        if not node and level == 0:
-            node = self.root
-        if node:
-            self.postorder(node.left,  level+1)
-            self.postorder(node.right,  level+1)
-            self.nodes_post.append(node.item)
-        return self.nodes_post
-
-
-
-if __name__ == '__main__':
-
-    bst = BSTwithTransversalRecursively()
-    l = [10, 5, 6, 3, 8, 2, 1, 11, 9, 4]
-    for i in l:
-        bst.addNode(i)
-
-    print "Is 8 a leaf? ", bst.isLeaf(8)
-    print "Whats the level of node 8? ", bst.getNodeLevel(8)
-    print "Is node 10 a root? ", bst.isRoot(10)
-    print "Is node 1 a root? ", bst.isRoot(1)
-    print "Whats the tree height? ", bst.getHeight()
-    print "Is this tree BST? ", bst.isBST()
-    print "Is this tree balanced? ", bst.isBalanced()
-
-    print("Pre-order: ", bst.preorder())
-    print("Post-order: ", bst.postorder())
-    print("In-order: ", bst.inorder())
-    print("BFT: ", bst.BFT())

src/trees/trees/binary_search_tree.py

@@ -1,103 +0,0 @@
-#!/usr/bin/python
-
-__author__ = "bt3"
-
-
-class Node(object):
-
-    def __init__(self, item=None,):
-
-        self.item = item
-        self.left = None
-        self.right = None
-
-    def __repr__(self):
-        return '{}'.format(self.item)
-
-
-    def _add(self, value):
-        new_node = Node(value)
-
-        if not self.item:
-            self.item = new_node
-
-        else:
-            if value > self.item:
-                self.right = self.right and self.right._add(value) or new_node
-            elif value < self.item:
-                self.left = self.left and self.left._add(value) or new_node
-            else:
-                print("BSTs do not support repeated items.")
-
-        return self # this is necessary!!!
-
-
-    def _search(self, value):
-        if self.item == value:
-            return True # or self
-
-        elif self.left and value < self.item:
-                return self.left._search(value)
-
-        elif self.right and value > self.item:
-                return self.right._search(value)
-
-        else:
-            return False
-
-
-    def _isLeaf(self):
-        return not self.right and not self.left
-
-
-    def _printPreorder(self):
-        print self.item
-
-        if self.left:
-            return self.left._printPreorder()
-
-        if self.right:
-            return self.right._printPreorder()
-
-
-
-class BST(object):
-
-    def __init__(self):
-        self.root = None
-
-    def add(self, value):
-        if not self.root:
-            self.root = Node(value)
-        else:
-            self.root._add(value)
-
-    def printPreorder(self):
-        if self.root:
-            self.root._printPreorder()
-
-    def search(self, value):
-        if self.root:
-            return self.root._search(value)
-
-
-
-if __name__ == '__main__':
-
-    bst = BST()
-    print "Adding nodes 1 to 10 in the tree..."
-    for i in range(1, 11):
-        bst.add(i)
-
-    print
-    print "Searching for nodes 16 and 6"
-    print bst.search(16)
-    print bst.search(6)
-
-    print
-    print "Printing preorder..."
-    bst.printPreorder()
-
-
-
-

src/trees/trees/binary_tree.py

@@ -1,122 +0,0 @@
-#!/usr/bin/python
-
-__author__ = "bt3"
-
-
-class Node(object):
-
-    def __init__(self, item=None,):
-
-        self.item = item
-        self.left = None
-        self.right = None
-
-    def __repr__(self):
-        return '{}'.format(self.item)
-
-
-    def _add(self, value):
-        new_node = Node(value)
-
-        if not self.item:
-            self.item = new_node
-        elif not self.left:
-            self.left = new_node
-        elif not self.right:
-            self.right = new_node
-        else:
-            self.left = self.left._add(value)
-        return self
-
-
-    def _search(self, value):
-        if self.item == value:
-            return True # or self
-
-        found = False # or False, thats diff from BST
-        if self.left:
-            found = self.left._search(value)
-
-        if self.right:
-            found =  found or self.right._search(value)
-
-        return found
-
-
-    def _isLeaf(self):
-        return not self.right and not self.left
-
-
-
-class BT(object):
-
-    def __init__(self):
-        self.root = None
-
-
-    def add(self, value):
-        if not self.root:
-            self.root = Node(value)
-        else:
-            self.root._add(value)
-
-
-    def printPreorder(self):
-        current = self.root
-        nodes, stack = [], []
-        while stack or current:
-            if current:
-                nodes.append(current.item) # this is what change
-                stack.append(current)
-                current = current.left
-            else:
-                current = stack.pop()
-                current = current.right
-        print nodes
-
-
-    def printPostorder(self):
-        current = self.root
-        nodes, stack = [], []
-        while stack or current:
-
-            if current:
-                stack.append(current)
-                current = current.left
-            else:
-                current = stack.pop()
-                nodes.append(current.item) # this is what change
-                current = current.right
-        print nodes
-
-
-    def search(self, value):
-        if self.root:
-            return self.root._search(value)
-
-
-
-
-if __name__ == '__main__':
-
-    bt = BT()
-    print "Adding nodes 1 to 10 in the tree..."
-    for i in range(1, 11):
-        bt.add(i)
-
-    print
-    print "Searching for nodes 16 and 6"
-    print bt.search(16)
-    print bt.search(6)
-
-    print
-    print "Printing preorder..."
-    bt.printPreorder()
-
-    print
-    print "Printing postorder..."
-    bt.printPostorder()
-
-    print
-    print "Printing Inorder..."
-    bt.printInorder()

src/trees/trees/transversing_bt.py

@@ -1,52 +0,0 @@
-#!/usr/bin/env python
-
-__author__ = "bt3"
-
-'''
-Reconstruct a binary tree given two sequences of node traversals,
-one from inorder and one from postorder traversal.
-'''
-
-class Node(object):
-    def __init__(self, value, right=None, left=None):
-        self.value = value
-        self.right = right
-        self.left = left
-
-def create_tree():
-    tree = Node(4)
-    tree.right = Node(6)
-    tree.left = Node(2)
-    tree.right.left = Node(5)
-    tree.right.right = Node(7)
-    tree.left.left = Node(1)
-    tree.left.right = Node(3)
-    return tree
-
-def inorder(tree):
-    if tree:
-        if tree.left:
-            inorder(tree.left)
-        print tree.value
-        if tree.right:
-            inorder(tree.right)
-
-def postorder(tree):
-    if tree:
-        if tree.left:
-            postorder(tree.left)
-        if tree.right:
-            postorder(tree.right)
-        print tree.value
-
-
-
-
-
-if __name__ == '__main__':
-    tree = create_tree()
-    print 'Printing inorder...'
-    inorder(tree)
-    print
-    print 'Printing postorder...'
-    postorder(tree)