swh_storage = <swh.storage.filter.FilteringProxyStorage object at 0x7fd0009b4b38> sample_data = <swh.storage.tests.storage_data.StorageData object at 0x7fd0b450e160> def test_filtering_proxy_storage_directory(swh_storage, sample_data): sample_directory = sample_data.directory > directory = next(swh_storage.directory_missing([sample_directory.id])) E TypeError: 'list' object is not an iterator .tox/py3/lib/python3.7/site-packages/swh/storage/tests/test_filter.py:117: TypeError