[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

src/anndata/_core/aligned_df.py

@@ -59,7 +59,7 @@ def mk_index(l: int) -> pd.Index:
         df = pd.DataFrame(
             anno,
             index=None if length is None else mk_index(length),
-            columns=None if len(anno) else [],
+            columns=None if anno else [],
         )
 
     if length is None:

src/anndata/_io/specs/methods.py

@@ -1041,7 +1041,7 @@ def read_dataframe_partial(
     df = pd.DataFrame(
         {k: read_elem_partial(elem[k], indices=indices[0]) for k in columns},
         index=read_elem_partial(elem[idx_key], indices=indices[0]),
-        columns=columns if len(columns) else None,
+        columns=columns if columns else None,
     )
     if idx_key != "_index":
         df.index.name = idx_key