style: fix formatting and clean up imports

Author: shuoweil

packages/bigframes/bigframes/operations/blob.py

@@ -14,18 +14,10 @@
 
 from __future__ import annotations
 
-import os
-import warnings
-from typing import Literal, Optional, Union, cast
-
-import pandas as pd
-import requests
 
 import bigframes.dataframe
-import bigframes.exceptions as bfe
 import bigframes.operations as ops
 import bigframes.series
-from bigframes import clients, dtypes
 from bigframes.core.logging import log_adapter
 
 FILE_FOLDER_REGEX = r"^.*\/(.*)$"

packages/bigframes/bigframes/session/polars_executor.py

@@ -122,7 +122,7 @@ def _is_node_polars_executable(node: nodes.BigFrameNode):
         return False
     for expr in node._node_expressions:
         if isinstance(expr, agg_expressions.Aggregation):
-            if not type(expr.op) in _COMPATIBLE_AGG_OPS:
+            if type(expr.op) not in _COMPATIBLE_AGG_OPS:
                 return False
         if isinstance(expr, expression.Expression):
             if not set(map(type, _get_expr_ops(expr))).issubset(_COMPATIBLE_SCALAR_OPS):