Visualize Python distribution dependency graphs.

pkg_tree.py

#!/usr/bin/env python
"""
Running::

    python pkg_tree.py | dot -Txlib

Requires `pydot`.
"""
import pkg_resources

import pydot


def dependency_edges(dists):
    for dist in dists:
        for req in dist.requires():
            dependency = pkg_resources.working_set.find(req)
            yield (dist, req, dependency)


def make_graph(edges):
    graph = pydot.Graph(graph_type='digraph', rankdir='LR')
    for (dist, req, dep) in edges:
        graph.add_edge(pydot.Edge(str(dist), str(dep), label=str(req)))
    return graph


def main():
    dists = pkg_resources.working_set
    print(make_graph(dependency_edges(dists)).to_string())


if __name__ == '__main__':
    main()

(Mirrored at https://bitbucket.org/snippets/pjdelport/EApE.)