def start_response(self, code):
    """Send code and headers. Must be run before using Response.out."""
    try:
      self._connection.send('HTTP/1.1 %d %s\r\n' %
                            (code, ResponseCode.GetReasonPhrase(code)))
      self._connection.send(str(self.headers))
    except __HOLE__:
      self._connection.close()
dataset/ETHPy150Open google/mysql-tools/pylib/http_server.py/Response.start_response