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|
********************
Any Python Tree Data
********************
.. image:: https://badge.fury.io/py/anytree.svg
:target: https://badge.fury.io/py/anytree
.. image:: https://img.shields.io/pypi/dm/anytree.svg?label=pypi%20downloads
:target: https://pypi.python.org/pypi/anytree
.. image:: https://readthedocs.org/projects/anytree/badge/?version=latest
:target: https://anytree.readthedocs.io/en/latest/?badge=latest
.. image:: https://coveralls.io/repos/github/c0fec0de/anytree/badge.svg
:target: https://coveralls.io/github/c0fec0de/anytree
.. image:: https://readthedocs.org/projects/anytree/badge/?version=stable
:target: https://anytree.readthedocs.io/en/stable/
.. image:: https://api.codeclimate.com/v1/badges/e6d325d6fd23a93aab20/maintainability
:target: https://codeclimate.com/github/c0fec0de/anytree/maintainability
:alt: Maintainability
.. image:: https://img.shields.io/pypi/pyversions/anytree.svg
:target: https://pypi.python.org/pypi/anytree
.. image:: https://img.shields.io/badge/code%20style-pep8-brightgreen.svg
:target: https://www.python.org/dev/peps/pep-0008/
.. image:: https://img.shields.io/badge/code%20style-pep257-brightgreen.svg
:target: https://www.python.org/dev/peps/pep-0257/
.. image:: https://img.shields.io/badge/linter-pylint-%231674b1?style=flat
:target: https://www.pylint.org/
.. image:: https://img.shields.io/badge/code%20style-black-000000.svg
:target: https://github.com/psf/black
.. image:: https://img.shields.io/github/contributors/c0fec0de/anytree.svg
:target: https://github.com/c0fec0de/anytree/graphs/contributors/
.. image:: https://img.shields.io/badge/PRs-welcome-brightgreen.svg?style=flat-square
:target: http://makeapullrequest.com
.. image:: https://img.shields.io/github/issues-pr/c0fec0de/anytree.svg
:target: https://github.com/c0fec0de/anytree/pulls
.. image:: https://img.shields.io/github/issues-pr-closed/c0fec0de/anytree.svg
:target: https://github.com/c0fec0de/anytree/pulls?q=is%3Apr+is%3Aclosed
Simple, lightweight and extensible Tree_ data structure.
Feel free to share_ info about your anytree project.
.. _share: https://github.com/c0fec0de/anytree/issues/34
.. toctree::
:maxdepth: 2
installation
intro
api
importer
exporter
tricks
Links
=====
* Documentation_
* GitHub_
* PyPI_
* Changelog_
* Issues_
* Contributors_
* If you enjoy anytree_
.. image:: https://cdn.buymeacoffee.com/buttons/default-orange.png
:width: 150
:target: https://www.buymeacoffee.com/1oYX0sw
Feel free to share_ info about your anytree project.
.. _anytree: https://anytree.readthedocs.io/en/stable/
.. _Documentation: https://anytree.readthedocs.io/en/stable/
.. _GitHub: https://github.com/c0fec0de/anytree
.. _PyPI: https://pypi.org/project/anytree/
.. _Changelog: https://github.com/c0fec0de/anytree/releases
.. _Issues: https://github.com/c0fec0de/anytree/issues
.. _Contributors: https://github.com/c0fec0de/anytree/graphs/contributors
.. _share: https://github.com/c0fec0de/anytree/issues/34
.. _Tree: https://en.wikipedia.org/wiki/Tree_(data_structure)
Getting started
===============
.. _getting_started:
Usage is simple.
**Construction**
>>> from anytree import Node, RenderTree
>>> udo = Node("Udo")
>>> marc = Node("Marc", parent=udo)
>>> lian = Node("Lian", parent=marc)
>>> dan = Node("Dan", parent=udo)
>>> jet = Node("Jet", parent=dan)
>>> jan = Node("Jan", parent=dan)
>>> joe = Node("Joe", parent=dan)
**Node**
>>> print(udo)
Node('/Udo')
>>> print(joe)
Node('/Udo/Dan/Joe')
**Tree**
>>> for pre, fill, node in RenderTree(udo):
... print("%s%s" % (pre, node.name))
Udo
├── Marc
│ └── Lian
└── Dan
├── Jet
├── Jan
└── Joe
For details see :any:`Node` and :any:`RenderTree`.
**Visualization**
>>> from anytree.exporter import UniqueDotExporter
>>> # graphviz needs to be installed for the next line!
>>> UniqueDotExporter(udo).to_picture("udo.png")
.. image:: static/udo.png
The :any:`UniqueDotExporter` can be started at any node and has various formatting hookups:
>>> UniqueDotExporter(dan,
... nodeattrfunc=lambda node: "fixedsize=true, width=1, height=1, shape=diamond",
... edgeattrfunc=lambda parent, child: "style=bold"
... ).to_picture("dan.png")
.. image:: static/dan.png
**Manipulation**
A second tree:
>>> mary = Node("Mary")
>>> urs = Node("Urs", parent=mary)
>>> chris = Node("Chris", parent=mary)
>>> marta = Node("Marta", parent=mary)
>>> print(RenderTree(mary))
Node('/Mary')
├── Node('/Mary/Urs')
├── Node('/Mary/Chris')
└── Node('/Mary/Marta')
Append:
>>> udo.parent = mary
>>> print(RenderTree(mary))
Node('/Mary')
├── Node('/Mary/Urs')
├── Node('/Mary/Chris')
├── Node('/Mary/Marta')
└── Node('/Mary/Udo')
├── Node('/Mary/Udo/Marc')
│ └── Node('/Mary/Udo/Marc/Lian')
└── Node('/Mary/Udo/Dan')
├── Node('/Mary/Udo/Dan/Jet')
├── Node('/Mary/Udo/Dan/Jan')
└── Node('/Mary/Udo/Dan/Joe')
Subtree rendering:
>>> print(RenderTree(marc))
Node('/Mary/Udo/Marc')
└── Node('/Mary/Udo/Marc/Lian')
Cut/Delete:
>>> dan.parent = None
>>> print(RenderTree(dan))
Node('/Dan')
├── Node('/Dan/Jet')
├── Node('/Dan/Jan')
└── Node('/Dan/Joe')
>>> print(RenderTree(mary))
Node('/Mary')
├── Node('/Mary/Urs')
├── Node('/Mary/Chris')
├── Node('/Mary/Marta')
└── Node('/Mary/Udo')
└── Node('/Mary/Udo/Marc')
└── Node('/Mary/Udo/Marc/Lian')
**Extending any python class to become a tree node**
The enitre tree magic is encapsulated by :any:`NodeMixin`,
add it as base class and the class becomes a tree node:
>>> from anytree import NodeMixin, RenderTree
>>> class MyBaseClass(object): # Just an example of a base class
... foo = 4
>>> class MyClass(MyBaseClass, NodeMixin): # Add Node feature
... def __init__(self, name, length, width, parent=None, children=None):
... super(MyClass, self).__init__()
... self.name = name
... self.length = length
... self.width = width
... self.parent = parent
... if children: # set children only if given
... self.children = children
Just set the `parent` attribute to reflect the tree relation:
>>> my0 = MyClass('my0', 0, 0)
>>> my1 = MyClass('my1', 1, 0, parent=my0)
>>> my2 = MyClass('my2', 0, 2, parent=my0)
>>> for pre, fill, node in RenderTree(my0):
... treestr = u"%s%s" % (pre, node.name)
... print(treestr.ljust(8), node.length, node.width)
my0 0 0
├── my1 1 0
└── my2 0 2
The `children` can be used likewise:
>>> my0 = MyClass('my0', 0, 0, children=[
... MyClass('my1', 1, 0),
... MyClass('my2', 0, 2),
... ])
>>> for pre, fill, node in RenderTree(my0):
... treestr = u"%s%s" % (pre, node.name)
... print(treestr.ljust(8), node.length, node.width)
my0 0 0
├── my1 1 0
└── my2 0 2
|
