[9] finish with adding BST(Binar Search Tree)

BudakovIS/docs/LinkedListPhoneBook.py

@@ -236,3 +236,85 @@ print("add Boris: ", root)
 root = bst_insert(root, 'Eva', '321-123')
 print("add Eva: ", root)
 print("====== END TEST =======\n\n\n")
+
+
+def bst_find(root, name):
+    if root is None:
+        return None
+    if name == root['name']
+        return root['phone']
+    elif name<root['name']:
+        return bst_find(root['left'], name)
+    else:
+        return bst_find(root['right'], name)
+
+
+print("====== START FIND TEST ======")
+print("search by Ivan`s phone: ", bst_find(root, 'Ivan'))
+print("search by Eva`s phone: ", bst_find(root,'Eva'))
+print("====== END TEST ====== \n\n\n")
+
+
+
+def bst_delete(root,name):
+    if root is None:
+        return None
+
+    if name< root['name']:
+        root['left'] = bst_delete(root['left'], name)
+    elif name > root['name']:
+        root['right'] = bst_delete(root['right'], name)
+
+    else:
+        if root['left'] is None:
+            return root['right']
+        if root['right'] is None:
+            return root['rihgt']
+
+        min_node = find_min(root['right'])
+        root['name'] = min_node['name']
+        root['phone'] = min_node['phone']
+
+        root['right'] = bst_delete(root['right'], min_node['name'])
+    return root
+
+
+
+def bst_list_all(root):
+    result = []
+    def inorder(node):
+        if node is None:
+            return
+        inorder(node['left'])
+        result.append((node['name'], node['phone']))
+        inorder(node['right'])
+    inorder(root)
+    return result
+
+
+print("====== GLOBAL TEST TREES ======")
+root = None
+
+root = bst_insert(root, "Ivan", "123-456")
+print("add Ivan: ", root)
+root = bst_insert(root, "Boris", "789-012")
+print("add Boris: ", root)
+root = bst_insert(root, "Anna", "345-678")
+print("add Anna: ", root)
+root = bst_insert(root, "Ivan", "111-222")  # обновление
+print("update Ivan: ", root)
+
+print("Find Ivan`s phone: ",bst_find(root, "Ivan"))    # 111-222
+print("Find Peter`s phone: ",bst_find(root, "Petr"))    # None
+
+root = bst_delete(root, "Boris")
+print("Del Boris")
+print("Find Boris: ",bst_find(root, "Boris"))   # None
+
+print("Find ALL: ",bst_list_all(root))        # [('Anna','345-678'), ('Ivan','111-222')]
+
+
+print("====== END TEST ======")
+
+
+