anytree
Powerful and Lightweight Python Tree Data Structure with various plugins
Decision gist · record as of 2026-08-14
Yes, if you need a simple, dependency-free tree library. The package is stable, supports current Python versions, has no known vulnerabilities, and is widely used (top 5000 on PyPI). The main caveat is that the license is undocumented—verify it meets your requirements before use in proprietary code. Maintenance is aging but not abandoned.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Graphviz must be installed separately on your system if you want to use UniqueDotExporter to generate image files.
- Low install friction with no runtime dependencies.
- Maintenance is aging—last release was 493 days ago, though the repository remains active with a recent commit on 2025-04-08 and 1088 stars.
License · maintenance · safety
(unclear) — License status is unclear; the package metadata does not specify a license. Verify licensing terms before use in proprietary or restricted contexts.
last release 2025-04-08 (493 days) · last repo commit 2025-04-08 · 1,088 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 10,482,845 downloads/mo, #1,450 on PyPI
Alternatives
Verify before relying
pip install anytree
from anytree import Node, RenderTree
root = Node("root")
child1 = Node("child1", parent=root)
child2 = Node("child2", parent=root)
for pre, fill, node in RenderTree(root):
print(f"{pre}{node.name}")- Whether graphviz must be installed separately for visualization features to work
- Performance characteristics with large or deeply nested trees
- Thread safety of tree operations
What it is and what it does
anytree is a pure-Python tree library that lets you build and work with hierarchical data by creating Node objects and linking them via parent-child relationships. You can construct trees from scratch, modify them by reparenting nodes, and traverse them using built-in iterators. The library also includes rendering tools like RenderTree for ASCII visualization and exporters like UniqueDotExporter for generating graph images, plus a NodeMixin base class that lets you add tree capabilities to any existing Python class.
The package is stable and supports Python 3.9 through 3.13 with no external runtime dependencies, making it straightforward to integrate into projects that need to represent or manipulate tree-shaped data—from organizational hierarchies to file systems to abstract syntax trees.
Use it for
- Build and visualize organizational hierarchies or family trees with parent-child relationships
- Represent file system structures or directory trees for traversal and analysis
- Create abstract syntax trees or expression trees for parsing and compiler work
- Export tree structures to graphviz dot format for diagram generation
- Add tree functionality to existing classes via NodeMixin without rewriting them
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you need a simple, dependency-free tree library.
The package is stable, supports current Python versions, has no known vulnerabilities, and is widely used (top 5000 on PyPI). The main caveat is that the license is undocumented—verify it meets your requirements before use in proprietary code. Maintenance is aging but not abandoned.
Install
anytree on PyPI
Before you install
Low install friction with no runtime dependencies. Maintenance is aging—last release was 493 days ago, though the repository remains active with a recent commit on 2025-04-08 and 1088 stars.
Graphviz must be installed separately on your system if you want to use UniqueDotExporter to generate image files.
License in practice
License status is unclear; the package metadata does not specify a license. Verify licensing terms before use in proprietary or restricted contexts.
Quickstart
pip install anytree
from anytree import Node, RenderTree
root = Node("root")
child1 = Node("child1", parent=root)
child2 = Node("child2", parent=root)
for pre, fill, node in RenderTree(root):
print(f"{pre}{node.name}")Verify before relying
- Whether graphviz must be installed separately for visualization features to work
- Performance characteristics with large or deeply nested trees
- Thread safety of tree operations
Package facts
| License | Not declared unclear |
| Python support | Supports the current Python release <4.0,>=3.9.2 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | None |
| Maintenance | Aging 493 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 10,482,845 / month, #1,450 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 5 - Production/StableProgramming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.9Topic :: Software Development :: Libraries :: Python Modules |
Evidence: anytree-2.13.0-py3-none-any.whl
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