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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 _process(self, request, result=None):
 """ Process the rules for the request. :param request: The Request object provided by WebOb. :param result: The Result object to store the results in. If None, one will be allocated. :returns: A Result object, containing the selected version and content type. """


        # Allocate a result and process all the rules
        result = result if result is not None else Result()
        self._proc_uri(request, result)
        self._proc_ctype_header(request, result)
        self._proc_accept_header(request, result)

        return result