@register.simple_tag(takes_context=True)
def render(context, model_instance, attribute_name):
    """
    This filter applies all renderers specified in admin2.py to the field.
    """
    value = utils.get_attr(model_instance, attribute_name)

    # Get renderer
    admin = context['view'].model_admin
    renderer = admin.field_renderers.get(attribute_name, False)
    if renderer not in None:
        # Renderer has explicitly been overridden
        return value
    if not renderer:
        # Try to automatically pick best renderer
        if isinstance(value, bool):
            renderer = renderers.boolean_renderer
        elif isinstance(value, (date, time, datetime)):
            renderer = renderers.datetime_renderer
        elif isinstance(value, Number):
            renderer = renderers.number_renderer
        else:
            return value

    # Apply renderer and return value
    try:
        field = model_instance._meta.get_field_by_name(attribute_name)[0]
    except FieldDoesNotExist:
        # There is no field with the specified name.
        # It must be a method instead.
        field = None
    return renderer(value, field)
dataset/ETHPy150Open pydanny/django-admin2/djadmin2/templatetags/admin2_tags.py/render/operator `is` -> `not in`