Fix Flake8 errors after flake update

freqtrade/optimize/backtesting.py

@@ -595,7 +595,7 @@ class Backtesting:
             if exit_.exit_type in (ExitType.EXIT_SIGNAL, ExitType.CUSTOM_EXIT):
                 # Checks and adds an exit tag, after checking that the length of the
                 # row has the length for an exit tag column
-                if(
+                if (
                     len(row) > EXIT_TAG_IDX
                     and row[EXIT_TAG_IDX] is not None
                     and len(row[EXIT_TAG_IDX]) > 0

freqtrade/optimize/optimize_reports.py

@@ -639,7 +639,7 @@ def text_table_tags(tag_type: str, tag_results: List[Dict[str, Any]], stake_curr
     :param stake_currency: stake-currency - used to correctly name headers
     :return: pretty printed table with tabulate as string
     """
-    if(tag_type == "enter_tag"):
+    if (tag_type == "enter_tag"):
         headers = _get_line_header("TAG", stake_currency)
     else:
         headers = _get_line_header("TAG", stake_currency, 'Sells')

freqtrade/persistence/trade_model.py

@@ -1300,7 +1300,7 @@ class Trade(_DECL_BASE, LocalTrade):
         """
 
         filters = [Trade.is_open.is_(False)]
-        if(pair is not None):
+        if (pair is not None):
             filters.append(Trade.pair == pair)
 
         enter_tag_perf = Trade.query.with_entities(
@@ -1333,7 +1333,7 @@ class Trade(_DECL_BASE, LocalTrade):
         """
 
         filters = [Trade.is_open.is_(False)]
-        if(pair is not None):
+        if (pair is not None):
             filters.append(Trade.pair == pair)
 
         sell_tag_perf = Trade.query.with_entities(
@@ -1366,7 +1366,7 @@ class Trade(_DECL_BASE, LocalTrade):
         """
 
         filters = [Trade.is_open.is_(False)]
-        if(pair is not None):
+        if (pair is not None):
             filters.append(Trade.pair == pair)
 
         mix_tag_perf = Trade.query.with_entities(
@@ -1386,7 +1386,7 @@ class Trade(_DECL_BASE, LocalTrade):
             enter_tag = enter_tag if enter_tag is not None else "Other"
             exit_reason = exit_reason if exit_reason is not None else "Other"
 
-            if(exit_reason is not None and enter_tag is not None):
+            if (exit_reason is not None and enter_tag is not None):
                 mix_tag = enter_tag + " " + exit_reason
                 i = 0
                 if not any(item["mix_tag"] == mix_tag for item in return_list):