def load(self, requirements_file=None):
        """Load or reload requirements from a requirements.txt file.

        :param requirements_file: if not given, the filename used from
            initialization will be read again.
        """
        if requirements_file is None:
            requirements_file = self.filename
            if requirements_file is None:
                raise ValueError("no filename provided")
        elif isinstance(requirements_file, text_type):
            requirements_file = Path(requirements_file)
        self.clear()
        with requirements_file.open() as f:
            self.loads(f.read())

        if isinstance(requirements_file, (text_type, Path)):
            self.filename = requirements_file
def test_get_translation_language_codes_that_need_reviewers_for_multi_lang(
            self):
        stats = suggestion_services.get_community_contribution_stats()
        stats.set_translation_suggestion_count_for_language_code('hi', 1)
        stats.set_translation_suggestion_count_for_language_code('fr', 1)

        language_codes_that_need_reviewers = (
            stats.get_translation_language_codes_that_need_reviewers()
        )

        self.assertEqual(
            language_codes_that_need_reviewers, {'hi', 'fr'})