structure_trees/a_sample_tree.ipynb

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    "# a sample tree, the starter program to begin all the trees with"
   ]
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    "\"\"\"Python3 program to demonstrate insert\n",
    "operation in binary search tree \"\"\"\n",
    "\n",
    "# A Binary Tree Node\n",
    "# Utility function to create a\n",
    "# new tree node\n",
    "class newNode:\n",
    "\n",
    "    # Constructor to create a newNode\n",
    "    def __init__(self, data):\n",
    "        self.key= data\n",
    "        self.left = None\n",
    "        self.right = self.parent = None\n",
    "\n",
    "# A utility function to insert a new\n",
    "# Node with given key in BST\n",
    "def insert(root, key):\n",
    "\n",
    "    # Create a new Node containing\n",
    "    # the new element\n",
    "    newnode = newNode(key)\n",
    "\n",
    "    # Pointer to start traversing from root\n",
    "    # and traverses downward path to search\n",
    "    # where the new node to be inserted\n",
    "    x = root\n",
    "\n",
    "    # Pointer y maintains the trailing\n",
    "    # pointer of x\n",
    "    y = None\n",
    "\n",
    "    while (x != None):\n",
    "        y = x\n",
    "        if (key < x.key):\n",
    "            x = x.left\n",
    "        else:\n",
    "            x = x.right\n",
    "    \n",
    "    # If the root is None i.e the tree is\n",
    "    # empty. The new node is the root node\n",
    "    if (y == None):\n",
    "        y = newnode\n",
    "\n",
    "    # If the new key is less then the leaf node key\n",
    "    # Assign the new node to be its left child\n",
    "    elif (key < y.key):\n",
    "        y.left = newnode\n",
    "\n",
    "    # else assign the new node its\n",
    "    # right child\n",
    "    else:\n",
    "        y.right = newnode\n",
    "\n",
    "    # Returns the pointer where the\n",
    "    # new node is inserted\n",
    "    return y\n",
    "\n",
    "# A utility function to do inorder\n",
    "# traversal of BST\n",
    "def Inorder(root) :\n",
    "\n",
    "    if (root == None) :\n",
    "        return\n",
    "    else:\n",
    "        Inorder(root.left)\n",
    "        print( root.key, end = \" \" )\n",
    "        Inorder(root.right)\n",
    "\n",
    "#Driver Code\n",
    "if __name__ == '__main__':\n",
    "\n",
    "    root = None\n",
    "    root = insert(root, \"m\")\n",
    "    insert(root, \"n\")\n",
    "    insert(root, \"l\")\n",
    "    insert(root, \"p\")\n",
    "    insert(root, \"q\")\n",
    "    insert(root, \"a\")\n",
    "    insert(root, \"b\")\n",
    "\n",
    "\n",
    "    # Pr inorder traversal of the BST\n",
    "\n",
    "\n",
    "# This code is contributed by\n",
    "# SHUBHAMSINGH10"
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      "\n",
      "                              q\n",
      "\n",
      "                    p\n",
      "\n",
      "          n\n",
      "\n",
      "m\n",
      "\n",
      "          l\n",
      "\n",
      "                              b\n",
      "\n",
      "                    a\n"
     ]
    }
   ],
   "source": [
    "# print binary tree in 2D copied from sample program\n",
    "COUNT = [10]\n",
    "def print2DUtil(root, space) :\n",
    "\n",
    "    # Base case\n",
    "    if (root == None) :\n",
    "        return\n",
    "\n",
    "    # Increase distance between levels\n",
    "    space += COUNT[0]\n",
    "\n",
    "    # Process right child first\n",
    "    print2DUtil(root.right, space)\n",
    "\n",
    "    # Print current node after space\n",
    "    # count\n",
    "    print()\n",
    "    for i in range(COUNT[0], space):\n",
    "        print(end = \" \")\n",
    "    print(root.key)\n",
    "\n",
    "    # Process left child\n",
    "    print2DUtil(root.left, space)\n",
    "\n",
    "# Wrapper over print2DUtil()\n",
    "def print2D(root) :\n",
    "    \n",
    "    # space=[0]\n",
    "    # Pass initial space count as 0\n",
    "    print2DUtil(root, 0)\n",
    "\n",
    "# Driver Code\n",
    "if __name__ == '__main__':\n",
    "\n",
    "    \n",
    "    print2D(root)"
   ]
  }
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