fluxons

Python library for easy graph creation.

Short description

Powered by python's magic __getattr__ and __call__, allows its users to express relations like:

g.fran.writes.fluxons

that will create on-the-fly the nodes fran and fluxons as members of g and the edge writes as member of fran pointing to fluxons.

Chain relations are possible:

g.fran.writes.fluxons.in.python

with the expected results.

Nodes and Edges can be called as functions to store metadata inside them:

g.fran(type='human').writes(lang='python').fluxons(type='code')

Useful for graphviz later use.

REMEMBER: nodes are unique; edges are not.

How to combine with graphviz

from fluxons import Graph
g = Graph()
g.fran.writes.fluxons

from graphviz import Digraph
dg = Digraph()
[dg.node(n.name, **n.md) for n in g]
[dg.edge(n.name, e.dest.name, **e.md) for n in g for e in n]
dg.render('/tmp/fluxons_graph')

Caveats

• As edges are not unique (by design), they should not be referenced as an attribute of its origin node; this will create a new edge with the same name.
• Creating an edge on-the-fly without creating its destination is pointless as its reference will be lost.
• Node and Edges names must be valid python variable names.
• Node and Edges names cannot be the same as List members.
• Node and Edges names cannot be name, owner, md or dest.

Usage

Installation in a virtualenv

• python -m venv venv
• . venv/bin/activate
• pip install -U pip
• pip install .

Run tests

• python -m unittest discover tests