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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 _request_helper(self, url, request_body):
 """ A helper method to assist in making a request and provide a parsed response. """

        response = None
        # pylint: disable=try-except-raise
        try:
            response = self.session.post(
                url, data=request_body, **self.request_defaults)

            # We expect utf-8 from the server
            response.encoding = 'UTF-8'

            # update/set any cookies
            if self._cookiejar is not None:
                for cookie in response.cookies:
                    self._cookiejar.set_cookie(cookie)

                if self._cookiejar.filename is not None:
                    # Save is required only if we have a filename
                    self._cookiejar.save()

            response.raise_for_status()
            return self.parse_response(response)
        except requests.RequestException as e:
            if not response:
                raise
            raise ProtocolError(
                url, response.status_code, str(e), response.headers)
        except Fault:
            raise
        except Exception:
            e = BugzillaError(str(sys.exc_info()[1]))
            # pylint: disable=attribute-defined-outside-init
            e.__traceback__ = sys.exc_info()[2]
            # pylint: enable=attribute-defined-outside-init
            raise e