This issue related with https://github.com/spoqa/flake8-import-order-spoqa/pull/2. Since `IMPORT_3RD_PARTY` were removed from `flake8-import-order == 0.17` (it brokes backward compatibility :( ), `flake8-import-order-spoqa` were failed to import it ( https://github.com/spoqa/flake8-import-order-spoqa/blob/master/flake8_import_order_spoqa.py#L5 ). So we have to fix it.