README.rst
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Links
=====
* Documentation_
* PyPI_
* GitHub_
* Changelog_
* Issues_
* Contributors_
* If you enjoy anytree_
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.. _anytree: https://anytree.readthedocs.io/en/2.11.0/
.. _Documentation: https://anytree.readthedocs.io/en/2.11.0/
.. _PyPI: https://pypi.org/project/anytree/2.11.0/
.. _GitHub: https://github.com/c0fec0de/anytree
.. _Changelog: https://github.com/c0fec0de/anytree/releases
.. _Issues: https://github.com/c0fec0de/anytree/issues
.. _Contributors: https://github.com/c0fec0de/anytree/graphs/contributors
.. _Node: https://anytree.readthedocs.io/en/2.11.0/api/anytree.node.html#anytree.node.node.Node
.. _RenderTree: https://anytree.readthedocs.io/en/2.11.0/api/anytree.render.html#anytree.render.RenderTree
.. _UniqueDotExporter: https://anytree.readthedocs.io/en/2.11.0/exporter/dotexporter.html#anytree.exporter.dotexporter.UniqueDotExporter
.. _NodeMixin: https://anytree.readthedocs.io/en/2.11.0/api/anytree.node.html#anytree.node.nodemixin.NodeMixin
.. _Importers: https://anytree.readthedocs.io/en/2.11.0/importer.html
.. _Exporters: https://anytree.readthedocs.io/en/2.11.0/exporter.html
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 Node_ and RenderTree_.
**Visualization**
>>> from anytree.exporter import UniqueDotExporter
>>> # graphviz needs to be installed for the next line!
>>> UniqueDotExporter(udo).to_picture("udo.png")
.. image:: https://anytree.readthedocs.io/en/latest/_images/udo.png
The 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:: https://anytree.readthedocs.io/en/latest/_images/dan.png
There are various other Importers_ and Exporters_.
**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:
>>> dan.parent = None
>>> print(RenderTree(dan))
Node('/Dan')
├── Node('/Dan/Jet')
├── Node('/Dan/Jan')
└── Node('/Dan/Joe')
**Extending any python class to become a tree node**
The entire tree magic is encapsulated by 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:
... 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
Documentation
-------------
Please see the Documentation_ for all details.
Installation
------------
To install the `anytree` module run::
pip install anytree
If you do not have write-permissions to the python installation, try::
pip install anytree --user