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)
