fix lint errors

python/datafusion/expr.py

@@ -22,15 +22,15 @@
 
 from __future__ import annotations
 
-from ._internal import (
-    expr as expr_internal,
-    LogicalPlan,
-    functions as functions_internal,
-)
-from datafusion.common import NullTreatment, RexType, DataTypeMap
 from typing import Any, Optional, Type
-from typing_extensions import deprecated
+
 import pyarrow as pa
+from datafusion.common import DataTypeMap, NullTreatment, RexType
+from typing_extensions import deprecated
+
+from ._internal import LogicalPlan
+from ._internal import expr as expr_internal
+from ._internal import functions as functions_internal
 
 # The following are imported from the internal representation. We may choose to
 # give these all proper wrappers, or to simply leave as is. These were added
@@ -196,7 +196,9 @@ def to_variant(self) -> Any:
         """Convert this expression into a python object if possible."""
         return self.expr.to_variant()
 
-    @deprecated("display_name() is deprecated. Use :py:meth:`~Expr.schema_name` instead")
+    @deprecated(
+        "display_name() is deprecated. Use :py:meth:`~Expr.schema_name` instead"
+    )
     def display_name(self) -> str:
         """Returns the name of this expression as it should appear in a schema.
 

python/datafusion/tests/test_expr.py

@@ -15,18 +15,21 @@
 # specific language governing permissions and limitations
 # under the License.
 
+import pyarrow
+import pytest
 from datafusion import SessionContext, col
-from datafusion.expr import Column, Literal, BinaryExpr, AggregateFunction
 from datafusion.expr import (
-    Projection,
-    Filter,
     Aggregate,
+    AggregateFunction,
+    BinaryExpr,
+    Column,
+    Filter,
     Limit,
+    Literal,
+    Projection,
     Sort,
     TableScan,
 )
-import pyarrow
-import pytest
 
 
 @pytest.fixture
@@ -196,6 +199,7 @@ def test_expr_getitem() -> None:
 
 def test_display_name_deprecation():
     import warnings
+
     expr = col("foo")
     with warnings.catch_warnings(record=True) as w:
         # Cause all warnings to always be triggered