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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 remove_type_from_resource( type_id, resource_type, resource_id,**kwargs):
 """ Remove a resource type trom a resource """

    node_id = resource_id if resource_type == 'NODE' else None
    link_id = resource_id if resource_type == 'LINK' else None
    group_id = resource_id if resource_type == 'GROUP' else None

    resourcetype = db.DBSession.query(ResourceType).filter(
                                        ResourceType.type_id==type_id,
                                        ResourceType.ref_key==resource_type,
                                        ResourceType.node_id == node_id,
    ResourceType.link_id == link_id,
    ResourceType.group_id == group_id).one()

    db.DBSession.delete(resourcetype)
    db.DBSession.flush()

    return 'OK'