minor style fixes

1 files changed, 3 insertions, 3 deletions

diff --git a/bsfs/triple_store/sparql/parse_filter.py b/bsfs/triple_store/sparql/parse_filter.py
index bf19a02..2f5a25b 100644
--- a/bsfs/triple_store/sparql/parse_filter.py
+++ b/bsfs/triple_store/sparql/parse_filter.py
@@ -151,16 +151,16 @@ class Filter():
             raise errors.BackendError(f'the range of predicate {pred} is undefined')
         dom, rng = pred.domain, pred.range
         # encapsulate predicate uri
-        puri = f'<{puri}>' # type: ignore [assignment] # variable re-use confuses mypy
+        uri_str = f'<{puri}>'
         # apply reverse flag
         if node.reverse:
-            puri = '^' + puri
+            uri_str = '^' + uri_str
             dom, rng = rng, dom # type: ignore [assignment] # variable re-use confuses mypy
         # check path consistency
         if not node_type <= dom:
             raise errors.ConsistencyError(f'expected type {dom} or subtype thereof, found {node_type}')
         # return predicate URI and next node type
-        return puri, rng
+        return uri_str, rng
 
     def _any(self, node_type: bsc.Vertex, node: ast.filter.Any, head: str) -> str:
         """