PyVirgo

This is a Python implementation of Virgo, the graph declarative language.

You can find details of Virgo with the Go implementation at https://github.com/r2d4/virgo

Virgo is designed so that we can express graphs in a config file. These could be dependency graphs, for example of a build process, or any other graph structure.

To invoke PyVirgo:

import virgo g = virgo.loads("a -> b, c <- d") g # doctest: +ELLIPSIS <virgo.graph.Graph object at ...> sorted(list(g.direct_successors_of("a"))) ['b', 'c']

It's more likely that we will want to load a graph from a file:

g2 = virgo.load("test/files/make.vgo") g2 # doctest: +ELLIPSIS <virgo.graph.Graph object at ...> g2.direct_successors_of("src files") {'test'}

We can access the 'node data' for each node, by identifier.

g2.nodes["src files"] 'go build ./...'