How to use the green.runner.run function in green

def main(test_module, exit = None, buffer = None):
        import green.loader, green.runner
        if buffer:
            green_args.quiet_stdout = True
        try:
            suite = green.loader.GreenTestLoader().loadTestsFromModule(test_module)  # new API (v2.9+)
        except AttributeError:
            suite = green.loader.loadFromModule(test_module)                         # legacy API
        results = green.runner.run(suite, sys.stdout, green_args)
        # Return the results in an object with a "result" attribute, same as unittest.main()
        return collections.namedtuple("Tuple", "result")(results)

if type(test_labels) == tuple:
                test_labels = list(test_labels)
            else:
                raise ValueError("test_labels should be a tuple of strings")
            if not test_labels:
                test_labels = ['.']

            args = mergeConfig(Namespace())
            if self.verbose != -1:
                args.verbose = self.verbose
            args.targets = test_labels
            stream = GreenStream(sys.stdout)
            suite = self.loader.loadTargets(args.targets)
            if not suite:
                suite = GreenTestSuite()
            result = run(suite, stream, args)

            # Django teardown
            self.teardown_databases(django_db)
            self.teardown_test_environment()
            return self.suite_result(suite, result)

# Discover/Load the test suite
    if testing:
        test_suite = None
    else:  # pragma: no cover
        loader = GreenTestLoader()
        test_suite = loader.loadTargets(args.targets,
                                        file_pattern=args.file_pattern)

    # We didn't even load 0 tests...
    if not test_suite:
        debug(
            "No test loading attempts succeeded.  Created an empty test suite.")
        test_suite = GreenTestSuite()

    # Actually run the test_suite
    result = run(test_suite, stream, args, testing)

    # Generate a test report if required
    if args.junit_report:
        from green.junit import JUnitXML
        adapter = JUnitXML()
        with open(args.junit_report, "w") as report_file:
            adapter.save_as(result, report_file)

    return(int(not result.wasSuccessful()))