Figure out which of your pip requirements depend on another

dig-dependencies.py

#! /usr/bin/env python
# Be sure to execute this with your virtualenv activated

from pip._vendor import pkg_resources
import sys


# The name of the pip package
# TODO error checking (when this is no longer a gist)
dependency = sys.argv[1]

for p in pkg_resources.working_set.by_key.values():
    for pr in p.requires():
        if str(pr).startswith(dependency):
            print("Dependency for {} in {}".format(dependency, p))