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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_id(self, request_id):
 """ Sets the request_id of this ErrorResponse. Request ID. :param request_id: The request_id of this ErrorResponse. :type: str """

        if request_id is not None and not re.search('^[A-Za-z0-9]{32}', request_id):
            raise ValueError("Invalid value for `request_id`, must be a follow pattern or equal to `/^[A-Za-z0-9]{32}/`")

        self._request_id = request_id