gdflib 0.0.1

关于gdflib

gdflib是一个用于导出GDF图形文件的Python包。

安装

gdflib可以从PyPI安装

easy_install gdflib

或

pip install gdflib

应该适用于大多数用户

使用方法

最简单的示例

>>> from gdflib import GdfEntries, Node
>>>
>>> entities = GdfEntries()
>>> entities.add_node(Node(name='node1', label='This is the first node'))
>>> entities.add_node(Node(name='node2', label='This is the second node'))
>>> entities.link('node1', 'node2')
>>> print entities.dumps()
nodedef>name , style INT, width DOUBLE, color VARCHAR, image VARCHAR, label VARCHAR, height DOUBLE, visible BOOLEAN, labelcolor VARCHAR, y DOUBLE, x DOUBLE, strokecolor VARCHAR, fixed BOOLEAN, labelvisible BOOLEAN
node1,1,4.000000,cornflowerblue,,'This is the first node',4.000000,true,cornflowerblue,,,cadetblue,false,false
node2,1,4.000000,cornflowerblue,,'This is the second node',4.000000,true,cornflowerblue,,,cadetblue,false,false
edgedef>node1 , node2 , directed BOOLEAN, color VARCHAR, weight DOUBLE, width DOUBLE, label VARCHAR, visible BOOLEAN, labelcolor VARCHAR, labelvisible BOOLEAN
node1,node2,true,dandelion,1.000000,3.000000,'1',true,dandelion,false

默认情况下，所有节点都实现了为GDF定义的标准属性，未指定的属性将获得默认值。可以通过《声明》接口定义自定义《节点》。

>>> from gdflib import String, Double
>>> from gdflib import GdfEntries, Node
>>>
>>> class Product(Node):
...     company = String(default='Unknown Company')
...     price = Double(required=True)
...
>>> entities = GdfEntries(Product)
>>> entities.add_node(Product(name='node1', company='Custom Company', price=33.10))
>>> entities.add_node(Product(name='node2', label='Low Cost Product', price=18.21))
>>> entities.link('node1', 'node2')
>>> entities.dumps()
nodedef>name , style INT, width DOUBLE, color VARCHAR, image VARCHAR, label VARCHAR, height DOUBLE, visible BOOLEAN, labelcolor VARCHAR, y DOUBLE, x DOUBLE, strokecolor VARCHAR, fixed BOOLEAN, labelvisible BOOLEAN, company VARCHAR, price DOUBLE
node1,1,4.000000,cornflowerblue,,'node1',4.000000,true,cornflowerblue,,,cadetblue,false,false,'Custom Company',33.100000
node2,1,4.000000,cornflowerblue,,'Low Cost Product',4.000000,true,cornflowerblue,,,cadetblue,false,false,'Unknown Company',18.210000
edgedef>node1 , node2 , directed BOOLEAN, color VARCHAR, weight DOUBLE, width DOUBLE, label VARCHAR, visible BOOLEAN, labelcolor VARCHAR, labelvisible BOOLEAN
node1,node2,true,dandelion,1.000000,3.000000,'1',true,dandelion,false

gdflib还提供了对自定义《边》的支持，这些边可以通过从《Edge》派生并提供附加属性来定义。在这种情况下，应使用《add_edge》调用而不是使用《link》函数来连接两个节点。