Don't inherit from object

freqtrade/optimize/backtesting.py

@@ -44,7 +44,7 @@ class BacktestResult(NamedTuple):
     sell_reason: SellType
 
 
-class Backtesting(object):
+class Backtesting:
     """
     Backtesting class, this class contains all the logic to run a backtest
 

freqtrade/optimize/edge_cli.py

@@ -16,7 +16,7 @@ from freqtrade.resolvers import StrategyResolver
 logger = logging.getLogger(__name__)
 
 
-class EdgeCli(object):
+class EdgeCli:
     """
     EdgeCli class, this class contains all the logic to run edge backtesting