How to use the opcua.ua.LocalizedText function in opcua

def test_xml_ext_obj(self):
        arg = ua.Argument()
        arg.DataType = ua.NodeId(ua.ObjectIds.Float)
        arg.Description = ua.LocalizedText("Nice description")
        arg.ArrayDimensions = [1, 2, 3]
        arg.Name = "MyArg"

        node = self.opc.nodes.objects.add_variable(2, "xmlexportobj2", arg)
        node2 = self._test_xml_var_type(node, "ext_obj", test_equality=False)
        arg2 = node2.get_value()

        self.assertEqual(arg.Name, arg2.Name)
        self.assertEqual(arg.ArrayDimensions, arg2.ArrayDimensions)
        self.assertEqual(arg.Description, arg2.Description)
        self.assertEqual(arg.DataType, arg2.DataType)

ref.IsForward = False
    ref.ReferenceTypeId = ua.NodeId.from_string("i=45")
    ref.SourceNodeId = ua.NodeId.from_string("i=7")
    ref.TargetNodeClass = ua.NodeClass.DataType
    ref.TargetNodeId = ua.NodeId.from_string("i=28")
    refs.append(ref)
    server.add_references(refs)
   
    node = ua.AddNodesItem()
    node.RequestedNewNodeId = ua.NodeId.from_string("i=8")
    node.BrowseName = ua.QualifiedName.from_string("Int64")
    node.NodeClass = ua.NodeClass.DataType
    node.ParentNodeId = ua.NodeId.from_string("i=27")
    node.ReferenceTypeId = ua.NodeId.from_string("i=45")
    attrs = ua.DataTypeAttributes()
    attrs.Description = ua.LocalizedText("Describes a value that is an integer between −9,223,372,036,854,775,808 and 9,223,372,036,854,775,807.")
    attrs.DisplayName = ua.LocalizedText("Int64")
    node.NodeAttributes = attrs
    server.add_nodes([node])
    refs = []
    ref = ua.AddReferencesItem()
    ref.IsForward = False
    ref.ReferenceTypeId = ua.NodeId.from_string("i=45")
    ref.SourceNodeId = ua.NodeId.from_string("i=8")
    ref.TargetNodeClass = ua.NodeClass.DataType
    ref.TargetNodeId = ua.NodeId.from_string("i=27")
    refs.append(ref)
    server.add_references(refs)
   
    node = ua.AddNodesItem()
    node.RequestedNewNodeId = ua.NodeId.from_string("i=9")
    node.BrowseName = ua.QualifiedName.from_string("UInt64")

node.ReferenceTypeId = ua.NodeId.from_string("i=45")
    attrs = ua.ReferenceTypeAttributes()
    attrs.Description = ua.LocalizedText("The type for non-looping hierarchical references that are used to aggregate nodes into complex types.")
    attrs.DisplayName = ua.LocalizedText("Aggregates")
    attrs.InverseName = ua.LocalizedText("AggregatedBy")
    node.NodeAttributes = attrs
    server.add_nodes([node])
   
    node = ua.AddNodesItem()
    node.RequestedNewNodeId = ua.NodeId.from_string("i=45")
    node.BrowseName = ua.QualifiedName.from_string("HasSubtype")
    node.NodeClass = ua.NodeClass.ReferenceType
    node.ParentNodeId = ua.NodeId.from_string("i=34")
    node.ReferenceTypeId = ua.NodeId.from_string("i=45")
    attrs = ua.ReferenceTypeAttributes()
    attrs.Description = ua.LocalizedText("The type for non-looping hierarchical references that are used to define sub types.")
    attrs.DisplayName = ua.LocalizedText("HasSubtype")
    attrs.InverseName = ua.LocalizedText("HasSupertype")
    node.NodeAttributes = attrs
    server.add_nodes([node])
   
    node = ua.AddNodesItem()
    node.RequestedNewNodeId = ua.NodeId.from_string("i=46")
    node.BrowseName = ua.QualifiedName.from_string("HasProperty")
    node.NodeClass = ua.NodeClass.ReferenceType
    node.ParentNodeId = ua.NodeId.from_string("i=44")
    node.ReferenceTypeId = ua.NodeId.from_string("i=45")
    attrs = ua.ReferenceTypeAttributes()
    attrs.Description = ua.LocalizedText("The type for non-looping hierarchical reference from a node to its property.")
    attrs.DisplayName = ua.LocalizedText("HasProperty")
    attrs.InverseName = ua.LocalizedText("PropertyOf")
    node.NodeAttributes = attrs

ref.IsForward = True
    ref.ReferenceTypeId = NumericNodeId(40, 0)
    ref.SourceNodeId = NumericNodeId(2343, 0)
    ref.TargetNodeClass = NodeClass.DataType
    ref.TargetNodeId = NumericNodeId(2340, 0)
    refs.append(ref)
    server.add_references(refs)
   
    node = ua.AddNodesItem()
    node.RequestedNewNodeId = NumericNodeId(11285, 0)
    node.BrowseName = QualifiedName('TimeAverage2', 0)
    node.NodeClass = NodeClass.Object
    node.TypeDefinition = NumericNodeId(2340, 0)
    attrs = ua.ObjectAttributes()
    attrs.Description = LocalizedText("Retrieve the time weighted average data over the interval using Simple Bounding Values.")
    attrs.DisplayName = LocalizedText("TimeAverage2")
    attrs.EventNotifier = 0
    node.NodeAttributes = attrs
    server.add_nodes([node])
    refs = []
    ref = ua.AddReferencesItem()
    ref.IsForward = True
    ref.ReferenceTypeId = NumericNodeId(40, 0)
    ref.SourceNodeId = NumericNodeId(11285, 0)
    ref.TargetNodeClass = NodeClass.DataType
    ref.TargetNodeId = NumericNodeId(2340, 0)
    refs.append(ref)
    server.add_references(refs)
   
    node = ua.AddNodesItem()
    node.RequestedNewNodeId = NumericNodeId(2344, 0)
    node.BrowseName = QualifiedName('Total', 0)

ref.ReferenceTypeId = ua.NodeId.from_string("i=45")
    ref.SourceNodeId = ua.NodeId.from_string("i=3065")
    ref.TargetNodeClass = ua.NodeClass.DataType
    ref.TargetNodeId = ua.NodeId.from_string("i=32")
    refs.append(ref)
    server.add_references(refs)
   
    node = ua.AddNodesItem()
    node.RequestedNewNodeId = ua.NodeId.from_string("i=44")
    node.BrowseName = ua.QualifiedName.from_string("Aggregates")
    node.NodeClass = ua.NodeClass.ReferenceType
    node.ParentNodeId = ua.NodeId.from_string("i=34")
    node.ReferenceTypeId = ua.NodeId.from_string("i=45")
    attrs = ua.ReferenceTypeAttributes()
    attrs.Description = ua.LocalizedText("The type for non-looping hierarchical references that are used to aggregate nodes into complex types.")
    attrs.DisplayName = ua.LocalizedText("Aggregates")
    attrs.InverseName = ua.LocalizedText("AggregatedBy")
    node.NodeAttributes = attrs
    server.add_nodes([node])
    refs = []
    ref = ua.AddReferencesItem()
    ref.IsForward = False
    ref.ReferenceTypeId = ua.NodeId.from_string("i=45")
    ref.SourceNodeId = ua.NodeId.from_string("i=44")
    ref.TargetNodeClass = ua.NodeClass.DataType
    ref.TargetNodeId = ua.NodeId.from_string("i=34")
    refs.append(ref)
    server.add_references(refs)
   
    node = ua.AddNodesItem()
    node.RequestedNewNodeId = ua.NodeId.from_string("i=45")
    node.BrowseName = ua.QualifiedName.from_string("HasSubtype")

ref.IsForward = True
    ref.ReferenceTypeId = NumericNodeId(40, 0)
    ref.SourceNodeId = NumericNodeId(11428, 0)
    ref.TargetNodeClass = NodeClass.DataType
    ref.TargetNodeId = NumericNodeId(2340, 0)
    refs.append(ref)
    server.add_references(refs)
   
    node = ua.AddNodesItem()
    node.RequestedNewNodeId = NumericNodeId(11429, 0)
    node.BrowseName = QualifiedName('VariancePopulation', 0)
    node.NodeClass = NodeClass.Object
    node.TypeDefinition = NumericNodeId(2340, 0)
    attrs = ua.ObjectAttributes()
    attrs.Description = LocalizedText("Retrieve the variance for the interval as calculated by the StandardDeviationPopulation which includes Simple Bounding Values.")
    attrs.DisplayName = LocalizedText("VariancePopulation")
    attrs.EventNotifier = 0
    node.NodeAttributes = attrs
    server.add_nodes([node])
    refs = []
    ref = ua.AddReferencesItem()
    ref.IsForward = True
    ref.ReferenceTypeId = NumericNodeId(40, 0)
    ref.SourceNodeId = NumericNodeId(11429, 0)
    ref.TargetNodeClass = NodeClass.DataType
    ref.TargetNodeId = NumericNodeId(2340, 0)
    refs.append(ref)
    server.add_references(refs)

node.ReferenceTypeId = ua.NodeId.from_string("i=45")
    attrs = ua.DataTypeAttributes()
    attrs.Description = ua.LocalizedText("b'A software certificate with a digital signature.'")
    attrs.DisplayName = ua.LocalizedText("SignedSoftwareCertificate")
    node.NodeAttributes = attrs
    server.add_nodes([node])
   
    node = ua.AddNodesItem()
    node.RequestedNewNodeId = ua.NodeId.from_string("i=388")
    node.BrowseName = ua.QualifiedName.from_string("SessionAuthenticationToken")
    node.NodeClass = ua.NodeClass.DataType
    node.ParentNodeId = ua.NodeId.from_string("i=17")
    node.ReferenceTypeId = ua.NodeId.from_string("i=45")
    attrs = ua.DataTypeAttributes()
    attrs.Description = ua.LocalizedText("b'A unique identifier for a session used to authenticate requests.'")
    attrs.DisplayName = ua.LocalizedText("SessionAuthenticationToken")
    node.NodeAttributes = attrs
    server.add_nodes([node])
   
    node = ua.AddNodesItem()
    node.RequestedNewNodeId = ua.NodeId.from_string("i=316")
    node.BrowseName = ua.QualifiedName.from_string("UserIdentityToken")
    node.NodeClass = ua.NodeClass.DataType
    node.ParentNodeId = ua.NodeId.from_string("i=22")
    node.ReferenceTypeId = ua.NodeId.from_string("i=45")
    attrs = ua.DataTypeAttributes()
    attrs.Description = ua.LocalizedText("b'A base type for a user identity token.'")
    attrs.DisplayName = ua.LocalizedText("UserIdentityToken")
    node.NodeAttributes = attrs
    server.add_nodes([node])
   
    node = ua.AddNodesItem()

node.ReferenceTypeId = ua.NodeId.from_string("i=45")
    attrs = ua.DataTypeAttributes()
    attrs.Description = ua.LocalizedText("A token representing a user identified by a user name and password.")
    attrs.DisplayName = ua.LocalizedText("UserNameIdentityToken")
    node.NodeAttributes = attrs
    server.add_nodes([node])
   
    node = ua.AddNodesItem()
    node.RequestedNewNodeId = ua.NodeId.from_string("i=325")
    node.BrowseName = ua.QualifiedName.from_string("X509IdentityToken")
    node.NodeClass = ua.NodeClass.DataType
    node.ParentNodeId = ua.NodeId.from_string("i=316")
    node.ReferenceTypeId = ua.NodeId.from_string("i=45")
    attrs = ua.DataTypeAttributes()
    attrs.Description = ua.LocalizedText("A token representing a user identified by an X509 certificate.")
    attrs.DisplayName = ua.LocalizedText("X509IdentityToken")
    node.NodeAttributes = attrs
    server.add_nodes([node])
   
    node = ua.AddNodesItem()
    node.RequestedNewNodeId = ua.NodeId.from_string("i=12504")
    node.BrowseName = ua.QualifiedName.from_string("KerberosIdentityToken")
    node.NodeClass = ua.NodeClass.DataType
    node.ParentNodeId = ua.NodeId.from_string("i=316")
    node.ReferenceTypeId = ua.NodeId.from_string("i=45")
    attrs = ua.DataTypeAttributes()
    attrs.DisplayName = ua.LocalizedText("KerberosIdentityToken")
    node.NodeAttributes = attrs
    server.add_nodes([node])
   
    node = ua.AddNodesItem()
    node.RequestedNewNodeId = ua.NodeId.from_string("i=938")

ref.IsForward = True
    ref.ReferenceTypeId = ua.NodeId.from_string("i=40")
    ref.SourceNodeId = ua.NodeId.from_string("i=11498")
    ref.TargetNodeClass = ua.NodeClass.DataType
    ref.TargetNodeId = ua.NodeId.from_string("i=68")
    refs.append(ref)
    server.add_references(refs)
   
    node = ua.AddNodesItem()
    node.RequestedNewNodeId = ua.NodeId.from_string("i=12908")
    node.BrowseName = ua.QualifiedName.from_string("MaxByteStringLength")
    node.NodeClass = ua.NodeClass.Variable
    node.TypeDefinition = ua.NodeId.from_string("i=68")
    attrs = ua.VariableAttributes()
    attrs.Description = ua.LocalizedText("The maximum length for a byte string that can be stored in the owning variable.")
    attrs.DisplayName = ua.LocalizedText("MaxByteStringLength")
    attrs.DataType = ua.NodeId(ua.ObjectIds.UInt32)
    attrs.ValueRank = -2
    node.NodeAttributes = attrs
    server.add_nodes([node])
    refs = []
    ref = ua.AddReferencesItem()
    ref.IsForward = True
    ref.ReferenceTypeId = ua.NodeId.from_string("i=40")
    ref.SourceNodeId = ua.NodeId.from_string("i=12908")
    ref.TargetNodeClass = ua.NodeClass.DataType
    ref.TargetNodeId = ua.NodeId.from_string("i=68")
    refs.append(ref)
    server.add_references(refs)
   
    node = ua.AddNodesItem()
    node.RequestedNewNodeId = ua.NodeId.from_string("i=11512")

node.ReferenceTypeId = ua.NodeId.from_string("i=45")
    attrs = ua.DataTypeAttributes()
    attrs.Description = ua.LocalizedText("Describes a value that is a structure containing diagnostics associated with a StatusCode.")
    attrs.DisplayName = ua.LocalizedText("DiagnosticInfo")
    node.NodeAttributes = attrs
    server.add_nodes([node])
   
    node = ua.AddNodesItem()
    node.RequestedNewNodeId = ua.NodeId.from_string("i=288")
    node.BrowseName = ua.QualifiedName.from_string("IntegerId")
    node.NodeClass = ua.NodeClass.DataType
    node.ParentNodeId = ua.NodeId.from_string("i=7")
    node.ReferenceTypeId = ua.NodeId.from_string("i=45")
    attrs = ua.DataTypeAttributes()
    attrs.Description = ua.LocalizedText("A numeric identifier for an object.")
    attrs.DisplayName = ua.LocalizedText("IntegerId")
    node.NodeAttributes = attrs
    server.add_nodes([node])
   
    node = ua.AddNodesItem()
    node.RequestedNewNodeId = ua.NodeId.from_string("i=307")
    node.BrowseName = ua.QualifiedName.from_string("ApplicationType")
    node.NodeClass = ua.NodeClass.DataType
    node.ParentNodeId = ua.NodeId.from_string("i=29")
    node.ReferenceTypeId = ua.NodeId.from_string("i=45")
    attrs = ua.DataTypeAttributes()
    attrs.Description = ua.LocalizedText("The types of applications.")
    attrs.DisplayName = ua.LocalizedText("ApplicationType")
    node.NodeAttributes = attrs
    server.add_nodes([node])
    refs = []
    ref = ua.AddReferencesItem()