def __len__(self):
        return self.layer_count
A very simple output format
dataset/ETHPy150Open django/django/django/contrib/gis/gdal/datasource.py/DataSource.__len__--crossover with--dataset/ETHPy150Open mozilla/inventory/vendor-local/src/django-extensions/build/lib/django_extensions/management/commands/print_settings.py/Command.print_simple