Updated basic_binary_tree.py

data_structures/binary_tree/basic_binary_tree.py

@@ -12,89 +12,103 @@ def __init__(self, data: int) -> None:
         self.right: Node | None = None
 
 
-def display(tree: Node | None) -> None:  # In Order traversal of the tree
+class BinaryTree:
     """
-    >>> root = Node(1)
-    >>> root.left = Node(0)
-    >>> root.right = Node(2)
-    >>> display(root)
-    0
-    1
-    2
-    >>> display(root.right)
-    2
+    A BinaryTree has a root node and methods for creating and manipulating binary trees.
     """
-    if tree:
-        display(tree.left)
-        print(tree.data)
-        display(tree.right)
 
-
-def depth_of_tree(tree: Node | None) -> int:
-    """
-    Recursive function that returns the depth of a binary tree.
-
-    >>> root = Node(0)
-    >>> depth_of_tree(root)
-    1
-    >>> root.left = Node(0)
-    >>> depth_of_tree(root)
-    2
-    >>> root.right = Node(0)
-    >>> depth_of_tree(root)
-    2
-    >>> root.left.right = Node(0)
-    >>> depth_of_tree(root)
-    3
-    >>> depth_of_tree(root.left)
-    2
-    """
-    return 1 + max(depth_of_tree(tree.left), depth_of_tree(tree.right)) if tree else 0
-
-
-def is_full_binary_tree(tree: Node) -> bool:
+    def __init__(self, root_data: int) -> None:
+        self.root = Node(root_data)
+
+    def display(self, tree: Node | None) -> None:
+        """
+        In Order traversal of the tree
+        >>> tree = BinaryTree(1)
+        >>> tree.root.left = Node(0)
+        >>> tree.root.right = Node(2)
+        >>> tree.display(tree.root)
+        0
+        1
+        2
+        >>> tree.display(tree.root.right)
+        2
+        """
+        if tree:
+            self.display(tree.left)
+            print(tree.data)
+            self.display(tree.right)
+
+    def depth_of_tree(self, tree: Node | None) -> int:
+        """
+        Recursive function that returns the depth of a binary tree.
+        >>> tree = BinaryTree(0)
+        >>> tree.depth_of_tree(tree.root)
+        1
+        >>> tree.root.left = Node(0)
+        >>> tree.depth_of_tree(tree.root)
+        2
+        >>> tree.root.right = Node(0)
+        >>> tree.depth_of_tree(tree.root)
+        2
+        >>> tree.root.left.right = Node(0)
+        >>> tree.depth_of_tree(tree.root)
+        3
+        >>> tree.depth_of_tree(tree.root.left)
+        2
+        """
+        return (
+            1 + max(self.depth_of_tree(tree.left), self.depth_of_tree(tree.right))
+            if tree
+            else 0
+        )
+
+    def is_full_binary_tree(self, tree: Node) -> bool:
+        """
+        Returns True if this is a full binary tree
+        >>> tree = BinaryTree(0)
+        >>> tree.is_full_binary_tree(tree.root)
+        True
+        >>> tree.root.left = Node(0)
+        >>> tree.is_full_binary_tree(tree.root)
+        False
+        >>> tree.root.right = Node(0)
+        >>> tree.is_full_binary_tree(tree.root)
+        True
+        >>> tree.root.left.left = Node(0)
+        >>> tree.is_full_binary_tree(tree.root)
+        False
+        >>> tree.root.right.right = Node(0)
+        >>> tree.is_full_binary_tree(tree.root)
+        False
+        """
+        if not tree:
+            return True
+        if tree.left and tree.right:
+            return self.is_full_binary_tree(tree.left) and self.is_full_binary_tree(
+                tree.right
+            )
+        else:
+            return not tree.left and not tree.right
+
+
+def main() -> None:
     """
-    Returns True if this is a full binary tree
-
-    >>> root = Node(0)
-    >>> is_full_binary_tree(root)
-    True
-    >>> root.left = Node(0)
-    >>> is_full_binary_tree(root)
-    False
-    >>> root.right = Node(0)
-    >>> is_full_binary_tree(root)
-    True
-    >>> root.left.left = Node(0)
-    >>> is_full_binary_tree(root)
-    False
-    >>> root.right.right = Node(0)
-    >>> is_full_binary_tree(root)
-    False
+    Main function for testing.
     """
-    if not tree:
-        return True
-    if tree.left and tree.right:
-        return is_full_binary_tree(tree.left) and is_full_binary_tree(tree.right)
-    else:
-        return not tree.left and not tree.right
-
-
-def main() -> None:  # Main function for testing.
-    tree = Node(1)
-    tree.left = Node(2)
-    tree.right = Node(3)
-    tree.left.left = Node(4)
-    tree.left.right = Node(5)
-    tree.left.right.left = Node(6)
-    tree.right.left = Node(7)
-    tree.right.left.left = Node(8)
-    tree.right.left.left.right = Node(9)
-
-    print(is_full_binary_tree(tree))
-    print(depth_of_tree(tree))
+    tree = BinaryTree(1)
+    tree.root.left = Node(2)
+    tree.root.right = Node(3)
+    tree.root.left.left = Node(4)
+    tree.root.left.right = Node(5)
+    tree.root.left.right.left = Node(6)
+    tree.root.right.left = Node(7)
+    tree.root.right.left.left = Node(8)
+    tree.root.right.left.left.right = Node(9)
+
+    print(tree.is_full_binary_tree(tree.root))
+    print(tree.depth_of_tree(tree.root))
     print("Tree is: ")
-    display(tree)
+    tree.display(tree.root)
 
 
 if __name__ == "__main__":