def check_requirements(installed_dists): missing_reqs_dict = {} incompatible_reqs_dict = {} for dist in installed_dists: key = '%s==%s' % (dist.project_name, dist.version) missing_reqs = list(get_missing_reqs(dist, installed_dists)) if missing_reqs: missing_reqs_dict[key] = missing_reqs incompatible_reqs = list(get_incompatible_reqs( dist, installed_dists)) if incompatible_reqs: incompatible_reqs_dict[key] = incompatible_reqs return (missing_reqs_dict, incompatible_reqs_dict) def get_missing_reqs(dist, installed_dists): """Return all of the requirements of `dist` that aren't present in `installed_dists`. """ installed_names = set(d.project_name.lower() for d in installed_dists) missing_requirements = set() for requirement in dist.requires(): if requirement.project_name.lower() not in installed_names: missing_requirements.add(requirement) yield requirement def get_incompatible_reqs(dist, installed_dists): """Return all of the requirements of `dist` that are present in `installed_dists`, but have incompatible versions. """ installed_dists_by_name = {} for installed_dist in installed_dists: installed_dists_by_name[installed_dist.project_name] = installed_dist for requirement in dist.requires(): present_dist = installed_dists_by_name.get(requirement.project_name) if present_dist and present_dist not in requirement: yield (requirement, present_dist)