import logging from pip._internal.cli.base_command import Command from pip._internal.operations.check import ( check_package_set, create_package_set_from_installed, ) logger = logging.getLogger(__name__) class CheckCommand(Command): """Verify installed packages have compatible dependencies.""" name = 'check' usage = """ %prog [options]""" summary = 'Verify installed packages have compatible dependencies.' def run(self, options, args): package_set = create_package_set_from_installed() missing, conflicting = check_package_set(package_set) for project_name in missing: version = package_set[project_name].version for dependency in missing[project_name]: logger.info( "%s %s requires %s, which is not installed.", project_name, version, dependency[0], ) for project_name in conflicting: version = package_set[project_name].version for dep_name, dep_version, req in conflicting[project_name]: logger.info( "%s %s has requirement %s, but you have %s %s.", project_name, version, req, dep_name, dep_version, ) if missing or conflicting: return 1 else: logger.info("No broken requirements found.")