LittleTree is a library that provides a tree data structure to python, which is both fast and flexible. It can be used to represent file systems, taxonomies and much more.

Features

• Intuitive basic creation and modification of trees.
• Efficient implementation of common tree operations and traversals. Works on trees that are 10 000 layers deep.
• Extensible. Subclass from BaseNode if you need more freedom.
• Can be imported / exported to many different formats (nested dict, rows, relations, graphviz, mermaid, newick, networkx).
• Purely written in Python.

Limitations

• Each node has at most one parent. (It's a tree not a graph!)
• Nodes cannot be their own ancestor.

Installing

• Use pip to install littletree:

$ pip install --upgrade littletree

Usage

A tree can be used in a similar way as a dict:

from littletree import Node

tree = Node(identifier="World")
tree["Asia"] = Node()
tree["Africa"] = Node()
tree["America"] = Node()
tree["Europe"] = Node()

# Print tree to console
tree.show()

# Show tree as an image
tree.to_image().show()

The resulting tree is printed like this:

World
├─ Asia
├─ Africa
├─ America
└─ Europe

If Pillow and graphviz are installed, it will also display the following image:

See tutorial for more information.

See further: Pypi | Github | Issues