add black to python CI (#178)

Closes #48

python/tests/test_db.py

@@ -119,4 +119,4 @@ def test_delete_table(tmp_path):
     assert db.table_names() == []
 
     db.create_table("test", data=data)
-    assert db.table_names() == ["test"]
+    assert db.table_names() == ["test"]

python/tests/test_io.py

@@ -19,6 +19,7 @@ import lancedb
 # You need to setup AWS credentials an a base path to run this test. Example
 #    AWS_PROFILE=default TEST_S3_BASE_URL=s3://my_bucket/dataset pytest tests/test_io.py
 
+
 @pytest.mark.skipif(
     (os.environ.get("TEST_S3_BASE_URL") is None),
     reason="please setup s3 base url",

python/tests/test_query.py

@@ -30,12 +30,16 @@ class MockTable:
 
 @pytest.fixture
 def table(tmp_path) -> MockTable:
-    df = pa.table({
-        "vector": pa.array([[1, 2], [3, 4]], type=pa.list_(pa.float32(), list_size=2)),
-        "id": pa.array([1, 2]),
-        "str_field": pa.array(["a", "b"]),
-        "float_field": pa.array([1.0, 2.0]),
-    })
+    df = pa.table(
+        {
+            "vector": pa.array(
+                [[1, 2], [3, 4]], type=pa.list_(pa.float32(), list_size=2)
+            ),
+            "id": pa.array([1, 2]),
+            "str_field": pa.array(["a", "b"]),
+            "float_field": pa.array([1.0, 2.0]),
+        }
+    )
     lance.write_dataset(df, tmp_path)
     return MockTable(tmp_path)