use "Any" type when type is None

fields = {}

for key, metadata in opts.data_labels.items():

    value = opts.data.get(key)

    optType = opts.typemap.get(type(metadata.default), type(metadata.default))

    optType = opts.typemap.get(type(metadata.default), type(metadata.default)) if metadata.default else Any

    if metadata.default is None:

        pass

    elif metadata is not None:

    if metadata is not None:

        fields.update({key: (Optional[optType], Field(default=metadata.default, description=metadata.label))})

    else:

        fields.update({key: (Optional[optType], Field())})