Attributes
==========

>>> from pygraphviz import *

Graph Defaults
--------------

>>> A=AGraph()
>>> A.graph_attr['label']='test'
>>> A.graph_attr['spam']='eggs'
>>> 'label' in A.graph_attr
True
>>> A.graph_attr['label']
'test'
>>> A.graph_attr.keys()
['label', 'spam']
>>> sorted(list(A.graph_attr.iteritems()))
[('label', 'test'), ('spam', 'eggs')]
>>> print A.string().expandtabs()
strict graph {
        graph [label=test,
                spam=eggs
        ];
}
<BLANKLINE>
>>> A.graph_attr['label']=''
>>> A.graph_attr['spam']=''
>>> print A.string().expandtabs()
strict graph {
}
<BLANKLINE>
>>> A.graph_attr['label']='test'
>>> del A.graph_attr['label']
>>> print A.string().expandtabs()
strict graph {
}
<BLANKLINE>


>>> A=AGraph(rankdir='LR',pack='true')
>>> print A.string().expandtabs()
strict graph {
        graph [pack=true,
                rankdir=LR
        ];
}
<BLANKLINE>



Node Defaults
--------------

>>> A=AGraph()
>>> A.node_attr['label']='test'
>>> 'label' in A.node_attr
True
>>> A.node_attr['label']
'test'
>>> A.node_attr.keys()
['label']
>>> A.node_attr
{'label': 'test'}
>>> list(A.node_attr.iteritems())
[('label', 'test')]
>>> print A.string().expandtabs()
strict graph {
        node [label=test];
}
<BLANKLINE>
>>> A.node_attr['label']=''
>>> print A.string().expandtabs()
strict graph {
}
<BLANKLINE>
>>> A.node_attr['label']='test'
>>> del A.node_attr['label']
>>> print A.string().expandtabs()
strict graph {
}
<BLANKLINE>

Edge Defaults
--------------

>>> A=AGraph()
>>> A.edge_attr['label']='test'
>>> 'label' in A.edge_attr
True
>>> A.edge_attr['label']
'test'
>>> A.edge_attr.keys()
['label']
>>> A.edge_attr
{'label': 'test'}
>>> list(A.edge_attr.iteritems())
[('label', 'test')]
>>> print A.string().expandtabs()
strict graph {
        edge [label=test];
}
<BLANKLINE>
>>> A.edge_attr['label']=''
>>> print A.string().expandtabs()
strict graph {
}
<BLANKLINE>
>>> A.edge_attr['label']='test'
>>> del A.edge_attr['label']
>>> print A.string().expandtabs()
strict graph {
}
<BLANKLINE>



Individual node attributes
--------------------------

>>> A=AGraph()
>>> A.add_node(1,label='test',spam='eggs')
>>> print A.string().expandtabs()
strict graph {
        1        [label=test,
                spam=eggs];
}
<BLANKLINE>

>>> A=AGraph()
>>> A.add_node(1)
>>> one=A.get_node(1)
>>> one.attr['label']='test'
>>> one.attr['spam']='eggs'
>>> 'label' in one.attr
True
>>> one.attr['label']
'test'
>>> sorted(one.attr.keys())
['label', 'spam']
>>> print A.string().expandtabs()
strict graph {
        1        [label=test,
                spam=eggs];
}
<BLANKLINE>
>>> one.attr['label']=''
>>> one.attr['spam']=''
>>> print A.string().expandtabs()
strict graph {
        1;
}
<BLANKLINE>
>>> one.attr['label']='test'
>>> del one.attr['label']
>>> print A.string().expandtabs()
strict graph {
        1;
}
<BLANKLINE>

Individual edge attributes
--------------------------

>>> A=AGraph()
>>> A.add_edge(1,2,label='test',spam='eggs')
>>> print A.string().expandtabs()
strict graph {
        1 -- 2   [label=test,
                spam=eggs];
}
<BLANKLINE>


>>> A=AGraph()
>>> A.add_edge(1,2)
>>> one=A.get_edge(1,2)
>>> one.attr['label']='test'
>>> one.attr['spam']='eggs'
>>> 'label' in one.attr
True
>>> one.attr['label']
'test'
>>> sorted(one.attr.keys())
['label', 'spam']
>>> print A.string().expandtabs()
strict graph {
        1 -- 2   [label=test,
                spam=eggs];
}
<BLANKLINE>
>>> one.attr['label']=''
>>> one.attr['spam']=''
>>> print A.string().expandtabs()
strict graph {
        1 -- 2;
}
<BLANKLINE>
>>> one.attr['label']='test'
>>> del one.attr['label']
>>> print A.string().expandtabs()
strict graph {
        1 -- 2;
}
<BLANKLINE>


Anonymous edges and attributes
------------------------------
>>> d="""graph test {\n a -- b [label="edge1"];\n a -- b [label="edge2"];\n }"""
>>> import os,tempfile
>>> (fd,fname)=tempfile.mkstemp()
>>> fh=open(fname,'w')
>>> fh.write(d)
>>> fh.close()
>>> A=AGraph(fname)
>>> print A.string().expandtabs()
graph test {
        a -- b   [label=edge1];
        a -- b   [label=edge2];
}
<BLANKLINE>