Merge pull request #671 from flairNLP/fix-empty-values-in-xpath-search

Fix a bug returning `None` for empty values in `xpath_search`

src/fundus/parser/data.py

@@ -201,7 +201,7 @@ def to_original_characters(text: str) -> str:
             xml = f"<result{i}>" + node2string(node) + f"</result{i}>"
             results.update(replace_keys_in_nested_dict(xmltodict.parse(xml), to_original_characters))
 
-        values = list(results.values())
+        values = list(filter(bool, results.values()))
 
         if scalar:
             if not values: