new version book with the first 2 chapters edited, examples added

src/trees/check_largest_item.py

@@ -0,0 +1,23 @@
+#!/usr/bin/env python
+
+__author__ = "bt3"
+
+
+from binary_search_tree import BST, Node
+
+def largest(node):
+
+    if node.right:
+        return largest(node.right)
+    return node.item
+
+
+if __name__ == '__main__':
+
+
+    bst = BST()
+    l = [10, 5, 6, 3, 8, 2, 1, 11, 9, 4]
+    for i in l:
+        bst.add(i)
+
+    print(largest(bst.root))