def _get_model(model_identifier):
    """
    Helper to look up a model from an "app_label.module_name" string.
    """
    try:
        Model = models.get_model(*model_identifier.split("."))
    except TypeError:
        Model = None
    if Model is None:
        raise base.DeserializationError(model_identifier % u"Invalid model identifier: '%s'")
    return Model
dataset/ETHPy150Open CollabQ/CollabQ/vendor/django/core/serializers/python.py/_get_model/swapped operands of `%`