lint fix

Author: claytonlin1110

test_unstructured/partition/test_auto.py

@@ -1074,16 +1074,21 @@ def test_auto_partition_respects_detect_language_per_element_arg():
 )
 def test_auto_partition_respects_language_arg(file_extension: str):
     elements = partition(
-        example_doc_path(f"language-docs/eng_spa_mult.{file_extension}"), languages=["deu"]
+        example_doc_path(f"language-docs/eng_spa_mult.{file_extension}"),
+        languages=["deu"],
     )
     assert all(element.metadata.languages == ["deu"] for element in elements)
 
 
 def test_auto_partition_language_fallback_flows_through_call_chain():
     """Integration test: language_fallback must flow partition() -> partitioner -> apply_metadata
-    -> apply_lang_metadata -> detect_languages(). A fallback returning None yields no language."""
+    -> apply_lang_metadata -> detect_languages(). A fallback returning None yields no language.
+    """
     with tempfile.NamedTemporaryFile(
-        mode="w", suffix=".txt", delete=False, encoding="utf-8"
+        mode="w",
+        suffix=".txt",
+        delete=False,
+        encoding="utf-8",
     ) as f:
         f.write("Hi.")
         path = f.name

unstructured/partition/common/lang.py

@@ -384,6 +384,7 @@ def _validate_fallback_languages(
     value: Optional[list[str]],
 ) -> Optional[list[str]]:
     """Validate and normalize language_fallback return value to ISO 639-3 codes.
+
     Returns None for None, non-list, or when no valid codes remain (invalid entries
     are logged and skipped).
     """
@@ -417,12 +418,13 @@ def detect_languages(
     Detects the list of languages present in the text (in the default "auto" mode),
     or formats and passes through the user inputted document languages if provided.
 
-    For short ASCII text (fewer than 5 words), language detection is unreliable. By default
-    such text is assigned English (["eng"]). Use ``language_fallback`` to override:
-    pass a callable that takes the text and returns a list of ISO 639-3 codes or None.
-    Return None to leave language unspecified. The caller is responsible for returning
-    valid ISO 639-3 codes (e.g. "eng", "fra"); invalid entries are filtered out and
-    a warning is logged; if none remain, this function returns None.
+    For short ASCII text (fewer than 5 words), language detection is unreliable. By
+    default such text is assigned English (["eng"]). Use ``language_fallback`` to
+    override: pass a callable that takes the text and returns a list of ISO 639-3
+    codes or None. Return None to leave language unspecified. The caller is
+    responsible for returning valid ISO 639-3 codes (e.g. "eng", "fra"); invalid
+    entries are filtered out and a warning is logged; if none remain, this function
+    returns None.
     """
     if languages is None:
         languages = ["auto"]