alg [pepeny] new alg binary tree

height_of_tree/tree.py

@@ -0,0 +1,84 @@
+class Node:
+    def __init__(self, info: int) -> None:
+        self.info = info
+        self.left: Node | None = None
+        self.right: Node | None = None
+
+    def __str__(self) -> str:
+        """
+        >>> str(Node(5))
+        '5'
+        """
+        return str(self.info)
+
+
+class BinarySearchTree:
+    def __init__(self) -> None:
+        self.root: Node | None = None
+
+    def create(self, val: int) -> None:
+        """
+        >>> bst = BinarySearchTree()
+        >>> bst.create(10)
+        >>> bst.root.info
+        10
+        >>> bst.create(5)
+        >>> bst.root.left.info
+        5
+        """
+        if self.root is None:
+            self.root = Node(val)
+        else:
+            current = self.root
+            while True:
+                if val < current.info:
+                    if current.left:
+                        current = current.left
+                    else:
+                        current.left = Node(val)
+                        break
+                elif val > current.info:
+                    if current.right:
+                        current = current.right
+                    else:
+                        current.right = Node(val)
+                        break
+                else:
+                    break
+
+
+def height(node: Node | None) -> int:
+    """
+    >>> height(None)
+    -1
+    >>> n = Node(3)
+    >>> height(n)
+    0
+    >>> n.left = Node(2)
+    >>> n.right = Node(5)
+    >>> n.right.right = Node(6)
+    >>> height(n)
+    2
+    """
+    if node is None:
+        return -1
+    return 1 + max(height(node.left), height(node.right))
+
+
+def tree_height_from_list(data: list[int]) -> int:
+    """
+    >>> tree_height_from_list([3,2,5,6])
+    2
+    >>> tree_height_from_list([1])
+    0
+    """
+    bst = BinarySearchTree()
+    for x in data:
+        bst.create(x)
+    return height(bst.root)
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod()