Apply isort to freqtrade codebase

freqtrade/data/history/jsondatahandler.py

@@ -8,12 +8,12 @@ from pandas import DataFrame, read_json, to_datetime
 
 from freqtrade import misc
 from freqtrade.configuration import TimeRange
-from freqtrade.constants import (DEFAULT_DATAFRAME_COLUMNS,
-                                 ListPairsWithTimeframes)
+from freqtrade.constants import DEFAULT_DATAFRAME_COLUMNS, ListPairsWithTimeframes
 from freqtrade.data.converter import trades_dict_to_list
 
 from .idatahandler import IDataHandler, TradeList
 
+
 logger = logging.getLogger(__name__)