Method __str__

binarytree/__init__.py:141–175

Return the pretty-print string for the binary tree. :return: Pretty-print string. :rtype: str **Example**: .. doctest:: >>> from binarytree import Node >>> >>> root = Node(1) >>> root.left = Node(2) >>> r

(self)

        return "Node({})".format(self.val)

    def __str__(self) -> str:
        """Return the pretty-print string for the binary tree.

        :return: Pretty-print string.
        :rtype: str

        **Example**:

        .. doctest::

            >>> from binarytree import Node
            >>>
            >>> root = Node(1)
            >>> root.left = Node(2)
            >>> root.right = Node(3)
            >>> root.left.right = Node(4)
            >>>
            >>> print(root)
            <BLANKLINE>
              __1
             /   \\
            2     3
             \\
              4
            <BLANKLINE>

        .. note::
            To include level-order_ indexes in the output string, use
            :func:`binarytree.Node.pprint` instead.

        .. _level-order:
            https://en.wikipedia.org/wiki/Tree_traversal#Breadth-first_search
        """
        lines = _build_tree_string(self, 0, False, "-")[0]
        return "\n" + "\n".join((line.rstrip() for line in lines))

    def __setattr__(self, attr: str, obj: Any) -> None:
        """Modified version of ``__setattr__`` with extra sanity checking.