pandas-dev#34131 review taken into account + linting

Author: OlivierLuG

pandas/tests/frame/test_arithmetic.py

@@ -11,10 +11,7 @@
 from pandas import DataFrame, MultiIndex, Series
 import pandas._testing as tm
 import pandas.core.common as com
-from pandas.core.computation.expressions import (
-    _MIN_ELEMENTS,
-    _NUMEXPR_INSTALLED,
-)
+from pandas.core.computation.expressions import _MIN_ELEMENTS, _NUMEXPR_INSTALLED
 from pandas.tests.frame.common import _check_mixed_float, _check_mixed_int
 
 # -------------------------------------------------------------------