=============
MaterialGroup
=============

.. py:class:: MaterialGroup


   .. py:method:: id
      :property:

      The id of the group.

      :type: str, read-only

   .. py:method:: name
      :property:

      The name of the group.

      :type: str
      :raises ReadOnlyError: If :py:obj:`Database` is in read only mode.


   .. py:method:: list_materials()

      List the materials of this group.


      :returns: The list of materials in the group.
      :rtype: list(Material)


   .. py:method:: remove(force = False)

      Delete a material group

      .. note::
         By default, only empty groups can be deleted (:py:obj:`NotEmptyError` is raised otherwise), use ``force`` to force deletion of non empty groups.

      :param force: Force the deletion of the group even if it contains materials.
      :type force: bool


      :raises NotEmptyError: If ``force`` is :py:obj:`False` and the group contains materials.
      :raises ReadOnlyError: If :py:obj:`Database` is in read only mode.