chore: Reformat code

tests/test_serializer.py

@@ -1,11 +1,9 @@
-from hypothesis import given
-from hypothesis.extra.pandas import data_frames, columns, range_indexes
-
+import pandas as pd
 from pandas.util.testing import assert_frame_equal
 
-import pandas as pd
-
 from demo.classes import CsvSerializer, ParquetSerializer
+from hypothesis import given
+from hypothesis.extra.pandas import columns, data_frames, range_indexes
 
 
 @given(