get_model StringIO usage

[suraj-nair-1]

In robosuite/models/base.py, why does the get_model() function use StringIO? Can't load_model_from_xml directly take a string? The current way appears to create a new .xml file under /tmp/ every time it is called.

def get_model(self, mode="mujoco_py"):
        """
        Returns a MjModel instance from the current xml tree.
        """

        available_modes = ["mujoco_py"]
        with io.StringIO() as string:
            string.write(ET.tostring(self.root, encoding="unicode"))
            if mode == "mujoco_py":
                from mujoco_py import load_model_from_xml

                model = load_model_from_xml(string.getvalue())
                return model
            raise ValueError(
                "Unkown model mode: {}. Available options are: {}".format(
                    mode, ",".join(available_modes)
                )
            )