Fix flake8 warnings

Author: MDUYN

investing_algorithm_framework/infrastructure/data_providers/__init__.py

@@ -12,6 +12,7 @@ def get_default_data_providers():
         CCXTDataProvider(),
     ]
 
+
 def get_default_ohlcv_data_providers():
     """
     Function to get the default OHLCV data providers.
@@ -23,6 +24,7 @@ def get_default_ohlcv_data_providers():
         CCXTOHLCVDataProvider(),
     ]
 
+
 __all__ = [
     'CCXTDataProvider',
     'CCXTOHLCVDataProvider',

investing_algorithm_framework/infrastructure/data_providers/ccxt.py

@@ -315,7 +315,6 @@ def create_start_date(self, end_date, time_frame, window_size):
         return end_date - timedelta(minutes=window_size * minutes)
 
 
-
 class CCXTOHLCVDataProvider(DataProvider):
     """
     CCXT OHLCV Data Provider is a data provider that uses the

investing_algorithm_framework/services/market_data_source_service/data_provider_service.py

@@ -1,10 +1,10 @@
 import logging
+from collections import defaultdict
 from datetime import datetime
 from typing import List, Optional
-from collections import defaultdict
 
 from investing_algorithm_framework.domain import DataProvider, \
-    OperationalException, NetworkError, ImproperlyConfigured, TradingDataType
+    OperationalException, ImproperlyConfigured, TradingDataType
 
 logger = logging.getLogger("investing_algorithm_framework")
 
@@ -28,6 +28,7 @@ def register_data_provider(self, data_provider: DataProvider) -> None:
         """
         self.data_providers.append(data_provider)
 
+
 class OHLCVDataProviderIndex:
     """
     Efficient lookup for ohlcv data providers in O(1) time.
@@ -130,7 +131,6 @@ def reset(self):
         self.data_providers = []
 
 
-
 class DataProviderService:
     data_providers: List[DataProvider] = []
     default_data_providers: List[DataProvider] = [