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 users():
    page = request.args.get("page", 1, type=int)
    search_form = UserSearchForm()

    if search_form.validate():
        users = search_form.get_results().\
            paginate(page, flaskbb_config['USERS_PER_PAGE'], False)
        return render_template("management/users.html", users=users,
                               search_form=search_form)

    users = User.query. \
        order_by(User.id.asc()).\
        paginate(page, flaskbb_config['USERS_PER_PAGE'], False)

    return render_template("management/users.html", users=users,
                           search_form=search_form)