More issues found by ruff

pyp2spec/license_processor.py

@@ -95,7 +95,7 @@ def license_keyword_to_spdx_identifiers(license_keyword: str | None) -> list | N
         parsed_license = licensing.parse(license_keyword, validate=True)
         # The objects are stored in sets, sort and return as a list
         return sorted(parsed_license.objects)
-    except ExpressionError as err:
+    except ExpressionError:
         # Don't bubble the error up, the calling function will handle the invalid result
         return None
 

pyp2spec/pypi_loaders.py

@@ -48,8 +48,8 @@ def _get_metadata_file(pypi_pkg_data: dict[Any, Any], session: Session | None =
         if entry["packagetype"] == "bdist_wheel":
             try:
                 response = _get_from_url(entry["url"] + ".metadata", error_str, session=session)
-            except PackageNotFoundError:
-                raise CoreMetadataNotFoundError(error_str)
+            except PackageNotFoundError as exc:
+                raise CoreMetadataNotFoundError(error_str) from exc
             return response.text
     else:
         raise CoreMetadataNotFoundError(error_str)