More cleanup.

[python_utils.git] / logical_search.py

diff --git a/logical_search.py b/logical_search.py
index 41ed729fc15df80a4477d3094e4dc980869741aa..c85b2628a0a25a7be6b013ec963e997799bddfc5 100644 (file)
--- a/logical_search.py
+++ b/logical_search.py
@@ -183,7 +183,7 @@ class Corpus(object):
     def invert_docid_set(self, original: Set[str]) -> Set[str]:
         """Invert a set of docids."""
 
-        return set([docid for docid in self.documents_by_docid.keys() if docid not in original])
+        return {docid for docid in self.documents_by_docid if docid not in original}
 
     def get_doc(self, docid: str) -> Optional[Document]:
         """Given a docid, retrieve the previously added Document."""