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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def render(self, template, **kwargs):
 """Renders the template :param template: The template to render. The template is actually a file, which is usually generated by :class:`rtcclient.template.Templater.getTemplate` and can also be modified by user accordingly. :param kwargs: The `kwargs` dict is used to fill the template. These two parameter are mandatory: * description * title Some of below parameters (which may not be included in some customized workitem type ) are mandatory if `keep` (parameter in :class:`rtcclient.template.Templater.getTemplate`) is set to `False`; Optional for otherwise. * teamArea (Team Area) * ownedBy (Owned By) * plannedFor(Planned For) * severity(Severity) * priority(Priority) * filedAgainst(Filed Against) Actually all these needed keywords/attributes/fields can be retrieved by :class:`rtcclient.template.Templater.listFields` :return: the :class:`string` object :rtype: string """


        try:
            temp = self.environment.get_template(template)
            return temp.render(**kwargs)
        except AttributeError:
            err_msg = "Invalid value for 'template'"
            self.log.error(err_msg)
            raise exception.BadValue(err_msg)