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If you enjoy anytree
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")
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")
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
1 maintainer
Release files for anytree 2.13.0
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| anytree-2.13.0.tar.gz | 48.4 kB | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| anytree-2.13.0-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 93.5 kB
Release files / anytree-2.13.0.tar.gz
| Download URL | anytree-2.13.0.tar.gz |
|---|---|
| Size | 48.4 kB |
| Tags | Source |
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Release files / anytree-2.13.0-py3-none-any.whl
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| Size | 45.1 kB |
| Tags | Python 3 |
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