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_set_translation_reviewer_count_for_lang_code_adds_new_lang_key(
            self):
        community_contribution_stats = (
            suggestion_services.get_community_contribution_stats()
        )
        self._assert_community_contribution_stats_is_in_default_state()
        (
            community_contribution_stats
            .translation_reviewer_counts_by_lang_code
        ) = {'en': 1}

        (
            community_contribution_stats
            .set_translation_reviewer_count_for_language_code('hi', 2)
        )

        self.assertDictEqual(
            (
                community_contribution_stats
                .translation_reviewer_counts_by_lang_code
            ),
            {'en': 1, 'hi': 2}
        )