| Tree | |
| ==== | |
| Rich has a :class:`~rich.tree.Tree` class which can generate a tree view in the terminal. A tree view is a great way of presenting the contents of a filesystem or any other hierarchical data. Each branch of the tree can have a label which may be text or any other Rich renderable. | |
| Run the following command to see a demonstration of a Rich tree:: | |
| python -m rich.tree | |
| The following code creates and prints a tree with a simple text label:: | |
| from rich.tree import Tree | |
| from rich import print | |
| tree = Tree("Rich Tree") | |
| print(tree) | |
| With only a single ``Tree`` instance this will output nothing more than the text "Rich Tree". Things get more interesting when we call :meth:`~rich.tree.Tree.add` to add more branches to the Tree. The following code adds two more branches:: | |
| tree.add("foo") | |
| tree.add("bar") | |
| print(tree) | |
| The tree will now have two branches connected to the original tree with guide lines. | |
| When you call :meth:`~rich.tree.Tree.add` a new Tree instance is returned. You can use this instance to add more branches to, and build up a more complex tree. Let's add a few more levels to the tree:: | |
| baz_tree = tree.add("baz") | |
| baz_tree.add("[red]Red").add("[green]Green").add("[blue]Blue") | |
| print(tree) | |
| Tree Styles | |
| ~~~~~~~~~~~ | |
| The Tree constructor and :meth:`~rich.tree.Tree.add` method allows you to specify a ``style`` argument which sets a style for the entire branch, and ``guide_style`` which sets the style for the guide lines. These styles are inherited by the branches and will apply to any sub-trees as well. | |
| If you set ``guide_style`` to bold, Rich will select the thicker variations of unicode line characters. Similarly, if you select the "underline2" style you will get double line style of unicode characters. | |
| Examples | |
| ~~~~~~~~ | |
| For a more practical demonstration, see `tree.py <https://github.com/willmcgugan/rich/blob/master/examples/tree.py>`_ which can generate a tree view of a directory in your hard drive. | |